Oasis Math 3

Worksheet

Complete the given number puzzle.

1 32

4

5

6

87

Across:
1. Largest number formed by digits 2, 3, 4, 0, 6, 5
2. 2 hundreds
4. 4 hundreds + 5 tens
6. Rounding off 458 to its nearest tens
7. 1 × 10,000 + 3 × 1000 + 5 × 100 + 5 × 10 + 7
8. Skip 231 by 100
Down:
2. Place value of 2 in the number 726
3 3 thousands + 5 hundreds + 2 tens + 6 ones
5. 200 + 60 + 3

Oasis School Mathematics Book-3 51

Objective Questions

Choose the correct alternative:
1. How many hundreds are equal to a thousand?

one ten five

2. What is the place value of 5 in the number 25614?

500 50 5000

3. Next number in the pattern 4312, 4412, 4512 is

4612 4322 5312

4. The greatest number formed by digits 7, 5, 3 and 9 is

7539 9753 9573

5. The smallest number formed by digits 2, 9, 0, 6, 4 is

29064 24690 20469

6. 4 ten thousands is equal to

forty thousands four lakhs forty lakhs

7. Four lakh five thousand and fifteen can be written as

4,50,015 405015 4515

8. The greatest number of 6-digit number is

10000 12345 99999

52 Oasis School Mathematics Book-3

9. 15 tens and 12 ones is equal to

152 162 150
9. The number name of 2,07,008 is

Two lakh seven thousand and eight

Two lakh seven hundred and eight

Twenty lakh seven thousand and eight
10. Which of the following statements is true?

Every odd number is divisible by 2.

The number with a zero in ones place is an even number.

Odd number can be paired.

Who am I ?

1. I have 14 Tens and 15 Ones.

I am .

2. I have 2 Hundreds, 13 Tens and 15 Ones.

I am .

3. My Ones digit is 5.

My Tens digit is 3 more than Ones digit.

My Hundreds digit is 4 less than Tens digit.

My Thousands digit is 3 less than Ones digit.

I am .

Oasis School Mathematics Book-3 53

Unit Evaluaiton Full Marks : 30

1. Put the given numbers on the place value chart and write their

number names: 6

2645

86214

260156

2. Write the correct numeral using a comma. 2
Eight thousand seven hundred twenty-one 4
Twenty-three thousand eight hundred twenty-six 2
2
3. Put >, < or =: 37642 864125 864187
26157 4719 15274 15274
5768

4. Arrange the given numbers in ascending order:
23741, 57136, 17814, , ,

5. Arrange the given numbers in descending order:
578237, 486493, 486498, , ,

54 Oasis School Mathematics Book-3

6. Write the place value of the coloured digit: 2

7. Write the greatest and the smallest number formed by the given digits: 4

2, 3, 7, 4 greatest 4, 5, 1, 2 greatest
smallest smallest

8, 2, 0, 5, 3 greatest 1,2,0,4 greatest
smallest smallest

8. Write the following numbers in short form: 3

5,00,000 + 40,000 + 8,000 + 700 + 80 + 5 = 3
6,00,000 + 20,000 + 3,000 + 50 + 8 =
40,000 + 300 + 5 = +
++
9. Write the following numbers in expanded form:
2
52346 = + + +

405321 = + + +

2007 = +++

10. Complete the following pattern.
100 110 120

Oasis School Mathematics Book-3 55

Our
Community

Contents
• Ascending and Descending Order of
Numbers
• Odd and Even Numbers
• Length
• Fraction
• Local Numbers

56 Oasis School Mathematics Book-3

Ascending and Descending order of Numbers

Ascending and Descending order of 4-digit Numbers

Look and learn.

Take any three numbers, 5264, 6312 and 4793. Ascending order: Smaller to
Identify, bigger
Which is the greatest number? 6312
Which is the smallest number? 4793. Descending order: Bigger to
smaller

Write the numbers from smaller to greater: 4793, 5264, 6312

It is increasing order or ascending order.

Write the numbers from greater to smaller : 6312, 5264, 4793

It is decreasing order or descending order.

Write the following numbers in ascending order.

6124, 5619, 6324

7968, 6235, 6789
2732, 2793, 1964

2782, 2968, 2351

Write the following numbers in descending order.

2374, 1968 2269

5982, 6027 6166

1964, 1282, 3124

3095, 3099, 3082

Oasis School Mathematics Book-3 57

Build the number from given digits and arrange them in ascending
order or descending order.

Numbers

23
6 4 Ascending order

Numbers

45
1 7 Descending order

73 Numbers
58 Ascending order

10 Numbers
54 Descending order

59 Numbers
20 Ascending order

58 Oasis School Mathematics Book-3

Ascending and Descending order of 5-digit Numbers

As stated earlier, arrangement of numbers from smaller to greater
one is increasing order or ascending order.

Arrangement of numbers from greater to smaller one is decreasing
order or descending order.

Write the following numbers in the given orders:

93725, 26812, 57314 Ascending order

18385, 18264, 18662 Ascending order

34261, 34272, 36868 Descending order

97284, 48392, 87681 Descending order

Arrange the given numbers in ascending order:

20624, 17347, 19487 , ,
,
32840, 31316, 40820 , ,
,
26317, 26540, 26412 ,

16820, 16816, 16807 ,

Arrange the given numbers in descending order:

34340, 35820, 32316 , ,
46820, 46970, 46112 , ,
30516, 30518, 30513 , ,
58320, 58475, 58471 , ,

Oasis School Mathematics Book-3 59

Odd and Even Numbers

Look and learn.

The above numbers do not form pairs.
\ These numbers are odd numbers.

The above numbers form pairs. Now, I understand!
\ These numbers are even numbers. 237462 is even;
156320 is even and
1, 3, 5, 7, 9, etc. are odd numbers. 763255 is odd.
2, 4, 6, 8, 10, etc. are even numbers.

How do we know whether a number forms a
pair or not if the number is large?

If the digit at the Ones place is even or zero the number
is even.
If the digit in the Ones place is odd, the number is odd.

Circle the even numbers:
23, 461, 472, 928, 5064, 6523, 7601, 8272, 9068
453, 69, 6667, 880, 7603, 7511, 9524, 9786, 8237
Circle the odd numbers:
52, 55, 573, 562, 8286, 873, 930, 961, 9582
9703, 6818, 7324, 7501, 7707, 8304, 8628, 9232, 4401

60 Oasis School Mathematics Book-3

Length

Measurement of length of the objects.

Look and learn.

This is a ruler. 1 cm
It length is 15 cm.
It is used to measure the length of the object. mm means millimeter
Length from the scale 0 to 1 is 1 cm. cm means centimeter
Length of each small division is 1 mm.
From 0 to 1, there are 10 small divisions.
Hence, 10 mm = 1 cm.

Length of shorter object is measured in cm and mm.
Lets find the length of given objects.

Two ends of pencils are on the scales '0' and '5'.
Hence, the length of given pencil is 5 cm.

Write the length of objects given below:

cm

Oasis School Mathematics Book-3 61

cm

cm

cm

Length of the given object in cm and mm.

What is the length of the comb?
One end of the comb is at 0.
Another end of the comb is 2 small division right from 5.
Hence, its length is 5 cm 2 mm.

I understand!
after 5, I have to count
the small division, which

represents mm.

62 Oasis School Mathematics Book-3

Write the length of given objects in cm and mm.
cm mm
cm mm
cm mm

cm mm

cm mm

Oasis School Mathematics Book-3 63

Using ruler find the length of given objects.

cm mm cm mm

cm mm cm mm
cm mm cm mm

cm mm cm mm

64 Oasis School Mathematics Book-3

Length of object in m and cm. 3m 4m

0m 1m 2m

This is a measuring tape. It measures the length of the objects in m and
cm. From the scale 0 to 1, there are 100 small divisions. Each small division
represents 1 cm.

Hence, 100 cm = 1 m

Length of bed, windows, table can be measured in meter. Lets measure
the length of window.

0m 1m 2m 3m 4m

One end of the window is on the scale 0.
Another end of the window in on the scale 2.
Hence, the length of window is 2 m.

Oasis School Mathematics Book-3 65

Lets measure the length 3m 4m

0m 1m 2m

One end of the table is on the scale 0. I understand! one
Another end is 4 divisions right from 2 m. small division is
Hence, the length of the bench is 2m 4 cm. equal to 10 cm.

Write the length of the given objects:

0m 1m 2m 3m 4m

m

0m
1m
2m

3m m cm

4m

66 Oasis School Mathematics Book-3

Activity Measure the length of given objects in
your home with the help of measuring
tape. Write their measurement in the box.

Heigh of freeze m cm
Length of the table m cm

Length of sofa-set m cm

Length of window m cm

Length of Quilt m cm
m cm
Length of your m cm
living room
m cm
Length of your
bedroom Oasis School Mathematics Book-3 67

Your height

Measurement of the Length a Line Segment using Ruler

PQ

Length of PQ = 4 cm I already learnt this in
the first chapter

Use a ruler to find the length of the given line segments:

cm

cm

cm mm

cm mm

cm mm cm mm
cm mm
68 Oasis School Mathematics Book-3

Estimation of Length of the Objects on the Surroundings.

About 12 cm About 3 cm About 10 cm

Length of some objects are given above with the help of this, choose
appropriate length of given objects.

5 cm 25 cm 16 cm 4 cm 10 cm 15 cm

5 cm 15 cm 25 cm 4 cm 13 cm 20 cm

5 cm 20 cm 30 cm 10 cm 20 cm 40 cm

Take help from this points.

• Pencil is little bit longer than pen. • Mobile is little bit longer than pen.

• Copy is longer than pencil. • Laptop is longer than copy.

Oasis School Mathematics Book-3 69

Estimation of the length of the objects of our surrounding.
Lets estimate the length of some other objects in the surrounding.

Estimated length of a table is around 2 m.
Estimated length of a bed is around 3 m.

Estimate the appropriate length of given objects.

3m 1m 6m

Table

Window 5m 2m 6m
2m 4m 5m
Door 8 m 10 m 3 m

Bed

70 Oasis School Mathematics Book-3

Estimate the length of following objects. Measure its actual
length and find their difference.

Object Estimated Actual length Difference
length

Comb

Pencil

Bedroom
Classroom

Book

Desk

Table

Your height

Oasis School Mathematics Book-3 71

Objective Questions

Choose the correct alternatives:
1. The largest number among the given 3 number is

43215 42144 44142

2. Which of the following statement is not true?

2, 4, 6, 8 are even numbers.

1, 3, 7, 9 are odd numbers.

A number containing 0, in ones place is odd.

3. Which one of the following relations is not true?

1 m = 10 cm 1m = 100 cm 1 cm = 10 mm

4. The approximate length of a pen is about

2 cm 1 m 12 cm

5. The estimated length of the bed is about 3m
1m 5m 1m

6. The estimated height of the door is about
3m 8m

7. Length of given pencil is

4 cm 8 mm 4 cm 3 mm 5 cm 3mm

72 Oasis School Mathematics Book-3

Unit Evaluation Full marks: 12

1. Write the following numbers in ascending order. 3

2357 1462 5716

6492 5491 4784

2. Write the following numbers in descending order. 3

6442 7122 6432

3391 3462 3014

3. Circle all the even numbers. 2
342 343 688 961
102 511 643 190

4. Tick the estimated length of following objects. 2

2 m 5 m 10 m

2 m 1 m 20 cm
5. Write the length of given objects. 2

Oasis School Mathematics Book-3 73

Fraction

Look and learn.

Halves one whole
one half is shaded
Take a strip of paper. Fold
it into two equal parts. one whole
Here, one third is shaded
The number of equal parts = 2 two thirds is shaded
The number of shaded part = 1

Thirds

Take a strip of paper. Fold
it into 3 equal parts.

Fourths

Take a strip of paper. Fold it into 4 equal parts.

one whole
one-fourth is shaded
two-fourths is shaded
three-fourths is shaded

Say: one fourth two fourths three-fourths
2 3
Write: 1 4 4
4

Fraction = the number of parts we are referring to

total number of parts

= 3
8

Remember!

1 = one-fourth 2 = two-fifths 3 = three-sevenths
4 5 7

1 = one-sixth 2 = two-fourths 5 = five-eighths
6 3 8

74 Oasis School Mathematics Book-3

Exercise 1. Write the fraction of the shaded and non-
shaded parts in each of the following
figures:

The fraction of shaded part =
The fraction of non-shaded part =

The fraction of shaded part =
The fraction of non-shaded part =

The fraction of shaded part =
The fraction of non-shaded part =

The fraction of shaded part =
The fraction of non-shaded part =

2. Write the fraction: Two-thirds = One-fifths =
Five-sevenths = Two-eights =

Three-fourths = Four-sevenths =

3. Shade the given fractions:

Oasis School Mathematics Book-3 75

Divide the given figure into different parts and shade them to represent the
fraction given below.

11
23

32
43

23
44

13
44

1 2
2 3

3 2
3 4

76 Oasis School Mathematics Book-3

Parts of Collection

Look and learn.

Take a collection of 12 balloons.
Divide them equally into two
groups.

How many balloons are there in each group?

Colour the balloons of one group.

How many parts of the whole did you colour?

What fraction of the collection did you colour?

Hence, 1 of 12 = 6
2

Divide the collection of 12 balloons equally into three groups.

How many balloons are there in each group?

Colour one group of balloon.

What fraction of the collection is coloured?

Hence, 1 of 12 =
3

Circle the given part of the collection and find the value of the given part
of collection as shown:

Oasis School Mathematics Book-3 77

Like and Unlike Fractions

Look and learn.

In the given figure, each stripe
of paper is divided into equal
number of parts. But the number
of shaded parts in each is different.
So the fractions represented here
are like fractions.

2, 3, 4 , etc are like fractions.
7 7 7

In the given figure, each strip of paper is divided into equal number of
parts. But the number of shaded parts in each is different. So the fractions
represented here are like fractions.

3, 1, 3 , etc. are unlike fractions.
4 5 7

Identify if the given fractions are like or unlike:

Find out the like fractions from the given sets:

2, 3, 1 ,1 ,4,2 Like fractions: ........................
3 55455

3, 4, 2 ,1 ,1,5,6 Like fractions: ........................
4 773277 Like fractions: ........................
5, 3, 4, 8, 6,5,1
11 7 9 17 11 7 2

2, 5, 7, 7, 2 Like fractions: ........................
8 8 10 8 5

78 Oasis School Mathematics Book-3

Comparison of Like Fractions

Look and learn.

The fraction of 85the. shaded part Remember !
in this figure is 5 Numerator

8 Denominator

The fraction of the shaded part in this figure is 3 .
8

In the first figure, more parts are shaded than in the second figure. Hence,

the fraction of shaded part in the first figure is greater than the fraction

of second figure 5 > 3 .
8 8

While comparing the like fractions, compare only the numerators. The

fraction having greater numerator is greater. 7 > 3 because
12 12
denominator is same and 7 > 3.

Write the fraction of shaded parts in each figure and put >, < or = in the
box:

Oasis School Mathematics Book-3 79

Put > or < in the box:
Arrange the given fractions in ascending order:
Arrange the given fractions in descending order:

80 Oasis School Mathematics Book-3

Addition and Subtraction of Like Fractions

Look and learn.

In the given figure, the fraction of red parts = 3
8
The fraction of blue parts = 2
8
The fraction of coloured parts = 5
8

\ 3 + 2 = 5
8 8 8

Add: Keep denominator same.
Add only the numerators.
4 + 2 = 4+2 = 6
7 7 7 7

Write the fractions of different coloured parts and the fraction of
coloured parts.

Fraction of red =

Fraction of blue =

Fraction of coloured part =

Fraction of red =

Fraction of blue =

Fraction of coloured part =

Fraction of red =

Fraction of blue =

Fraction of coloured part =

Oasis School Mathematics Book-3 81

Add the following fractions:

3 + 2 3 + 2 5 + 7
7 7 13 13 17 17

= 3+2 = 5
7 7

3 + 7 6 + 8 11 + 17
19 19 23 23 19 19

Subtraction of Like Fractions

Look and learn.

In the given figure, the fraction of the shaded part is 5 .
8
2 3
If the fraction 8 is taken out, the fraction of the shaded part is 8 .

\ 5 – 2 = 3
8 8 8

Subtract: To subtract the like fractions

7 – 3 keep denominator the
11 11 same and subtract only the

7–3 numerators.
11
=

= 4
11

82 Oasis School Mathematics Book-3

Subtract as shown:
2
5

Subtract:

11 – 7
19 19

Oasis School Mathematics Book-3 83

Objective Questions

Colour the correct alternatives. 2 3
1. Three fourths means 4 4

1
4

2. Circled part of this figure represents:

1 of 15 2 of 15 1 of 15
4 3 3

3. The fraction with numerator 5 and denominator 7 is 5
57 7
10 5

4. Which of the following are like fractions?

2, 1, 4, 6 2, 2, 2, 2 1, 3, 4, 5
3289 3456 7777

5. The ascending order of fractions 2 , 4 , 1 is
5 5 5

1, 2, 4 2, 1, 4 4, 2, 1
555 555 555

6. 2 + 1 is equal to 4 3 2
7 7 7 7 7

7. 5 – 2 is equal to 7 6 3
9 9 9 9 9

8. Which of the following are equivalent fractions?

1 and 1 1 and 1 1 and 2
2 3 2 4 2 4

84 Oasis School Mathematics Book-3

Unit Evaluation Full Marks : 12

1. Write the fraction to represent the shaded parts in each of the

following figures: 2

2. Find the like fractions from the given sets of fractions: 3

a. 22 , 3 , 1 , 3 , 1 Like fractions: 2
4 5 5 2
1
b. 71 , 1 , 2 , 6 , 3 Like fractions: 9
6 7 7 4
2
c. 3 , 2 , 5 , 4 , 5 Like fractions:

11 11 7 8 11

3. Put < or > in the box:

a. 2 3 b. 6 3 c. 8 9 d. 4

5 5 11 11 13 13 9

4. Add or subtract:

a. 2 + 5 b. 8 – 2
13 13 17 17

5. Divide the given figure into different part and shade them to

represent the fraction given below. 3

13
44

2
3

Oasis School Mathematics Book-3 85

Local Number System

Look and learn.

Discuss the different script of number system given below.

Number system on Brahmi script

Number system on Ranjana script 0
Number system on Limbu script
Number system on Kirant script
Number system on Tibetan script

source: google

86 Oasis School Mathematics Book-3

My Creation

Contents
• Points and Lines
• Angles
• Geometrical Shapes

Oasis School Mathematics Book-3 87

Points and Lines

Look and learn.

Point ABC D

A dot (•) represents a point.
It has no length, no breadth and no height.

It is denoted by the capital letters A, B, C, D, etc.

Line Q

In the given figure, Pand Q are any two points. P
The arrows on both the sides show that it is B
endless on both the sides. PQ is a line. AB and
XY are also lines. Y
A

Line segment X B

Take any two points A and B. Join them. A
A and B are the end points. AB is a line
segment.
It has a definite length.

1. Identify which of the following are lines and line segments. Write

their name. A
N
Q XY

M
PB

Line Segment PQ

2. Count the number of line segments and write their names:

P A EF
BC GH
2

QR

88 Oasis School Mathematics Book-3

Measuring a Line Segment

Aline segment has two end points. To measure the line segment, we use a ruler.
0 cm 2.5 cm

The ruler is marked on both the edges. The edges of the given ruler are
marked from 1 to 15 cm. These numbers represent centimeter.

How to measure the length of the given line segment AB ?

AB

• Place the edge of a ruler along the line segment AB so that zero mark
on the scale is at A.

• Read the mark on the ruler at point B.
• In the above figure, the mark on B is 4 cm.
\ Length of the line segment AB = 4 cm.

Measure length of the given line segments: X

A B cm

N
Q

M Y
R
cm
cm cm

Oasis School Mathematics Book-3 89

Drawing of a Line Segment

To draw a line segment, look at the following example:
Draw a line segment AB of 6 cm:

AB

• Place a ruler across a sheet of paper and mark point A against the
0 mark of the ruler.

• Mark a point B against the 6 cm of the ruler.

• Keeping the ruler pressed, move the tip of pencil from A to B
along its edge.

• The line segment is 6 cm long.

Draw the line segment in the box given below:

AB = 3 cm. PQ = 6 cm.

XY = 5 cm. CD = 4 cm.

90 Oasis School Mathematics Book-3

Eexercise A

1. Identify line or line segment: N

Q

RS M

PB

X

2. Measure the length of the given line segments:

B QY

P
A

3. Write the name of the line segments in the given figures:

XP

QS

YZ R

4. Join the given pairs of points using a ruler and measure the length
of line segments so formed:

QR

P

PQ = cm RS = cm

Oasis School Mathematics Book-3 91

M

MN = cm N XY = S
X
cm

5. Measure the length of each line segment of the given figures:

PQ

S R
A
X

B Y XY = Z
C XZ =
AB = YZ = cm
cm
BC = cm
cm
cm

6. Using a ruler, draw a line segment of the given length in
your copy:

a. AB = 6 cm b. MN = 8 cm c. PQ = 4.5 cm

d. XY = 5 cm e. EF = 6.5 cm f. YZ = 7.5 cm

92 Oasis School Mathematics Book-3

Angle
Angle formed on Solid Object

Look and learn.

Can you identify the angles on the solid object?
Show the angle on the given solid objects.

Project work

Paste tooth peak on the chart paper to show different triangles.

Oasis School Mathematics Book-3 93

Angle between two Lines A
C
Observe the given figure. It has two line segments
AB and BC. These two line segments meet at point B.
The two line segments form an angle at B.

We read this angle as “angle ABC” or simply angle B.

The notation of an angle is . B

How to read an angle? Say Write
Angle ABC ∠ABC
P

∠PQR or ∠RQP

Always keep the
Q R vertex at the middle.

Note: This angle can also be written as ∠Q.

Write the names of the given angles in both the ways: C

P ZA

Q

R XY B

∠PQR or ∠RQP or or

Vertex and arms of an angle: vertex arm P
Q R
Observe the ∠PQR. angle
This angle is formed by two line segments PQ arm
and QR. PQ and QR are the arms of ∠PQR.
Line segments PQ and QR meet at Q.
Q is the vertex.

Figure Vertex Arms

A

B AB and BC

BC

94 Oasis School Mathematics Book-3

Write the vertex and arms of given angles. A

P

Q

RB C

Vertex and Vertex and
Arms Arms

Comparison of angles

Look at the given pair of clocks carefully.

In the above two figures, there is an angle between two hands of the

clock. Which angle is greater? It is greater in the
first figure than in
Examine the distance between the tips
of the minute and the hour hands. the second one.

Therefore, the first angle is greater than the second.

Compare the angles given below and write (L) for the larger angle and
(S) for smaller angle:

Oasis School Mathematics Book-3 95

Identification of Right Angle

Angle between two edges of a right angle
book is a right angle.
X not right angle
AP
DE

B CQ R YZ F

It is a right angle. It is not a right angle. It is not a right angle. It is a right angle.

Tick (√) the right angle and cross (×) which is not a right angle.

Draw another line on the given line to make a right angle ABC. B

A
A

A BB

Draw three different angles in your copy.
Identify whether the angle formed by two edges of given object is a
right angle or not.
Angle between two edges of a book.
Angle between two edges of star.
Angle between two sides of a door.

96 Oasis School Mathematics Book-3

Eexercise

1. Write name of the angle, its vertex and arms in each figure:

P XZ

QR Y

Name PQR Name
Arms
Arms PQ and QR Vertex and

Vertex Q

BE

D

A C Name F
Arms
Name and Vertex and

Arms

Vertex

2. Observe the given pair of angles and write the names of the greater
angle and the smaller angle.

PX Dx

Q RY Z E FY Z
C
Greater angle = Greater angle =
Smaller angle = Smaller angle =

3. Draw an angle in your copy and DA
then draw two more angles one
of which is greater and another is E FB
smaller than the first.
Greater angle =
Smaller angle =

Oasis School Mathematics Book-3 97

Geometrical Shapes

Look and learn.

Triangle Quadrilateral Circle

Triangle, quadrilateral, circle, etc. are the examples of plane figures.

Triangles

Take a set square and draw along its sides. The figure so formed is a
triangle.

A triangle is a closed figure formed by joining three line segments.

Sides, angles and vertices of a triangle
A triangle has 3 sides, 3 angles and 3 vertices.

A Vertex Its sides : AB, BC and AC.

Side Side Its vertices: A, B and C.

Its angles: ∠ABC, ∠BAC and
∠ACB.

B Side C
Vertex Vertex

Note: Plural form of vertex is vertices. Say: Triangle ABC
Write DABC
Naming of triangles

A

Name of this triangle is
DABC or DBAC or DCAB.

BC

98 Oasis School Mathematics Book-3

Name the following triangles and write their vertices, sides and angles.

A The name of the triangle

Sides , and

Angles , and

B C Vertices , and

P The name of the triangle

Sides , and
, and
R

Angles

Q Vertices , and

Name the given triangles. Write their sides, angles and vertices.

XA

YZ B C

The name of triangle: The name of triangle: and
and
Sides: , and Sides: , and
Angles: , and Angles: ,
Vertices: , and Vertices: ,

Oasis School Mathematics Book-3 99

Drawing of a Triangle

Look and learn.

A • Take any three points. A, B
BC and C as shown in the figure.

• Join B and C with the help
of the ruler as shown in the
figure.

• Similarly, join A and B, A and
C.

The figure so formed is ∆ ABC.

Join the given points to form triangles and write their names as shown:

A PX
Z

Q R Y
BC

∆ ABC

Quadrilateral

Look and learn.

Place a match box on a piece of paper and draw the outline of its bottom
surface.

Sides, angles and vertices of a quadrilateral
A quadrilateral has 4 sides, 4 angles and 4 vertices.

Side Its sides : AB, BC, CD and DA
Its vertices: A, B, C and D
Its angles: ∠DAB, ∠ABC, ∠BCD and
∠ADC

100 Oasis School Mathematics Book-3