Page 183 - Maths Class 05

A S

In the given figure, points R, S and T are in the interior of
Q
ÐABC. Points P and Q are in the exterior of ÐABC.
R T

B
Practice - 13.2
Practice - 13.2 P C
Practice - 13.2
Practice - 13.2
1. Look at the following figures and fill in the blanks.

a. b. c. X d.
A P L

M
N
B Q Y
C R Z

Angle _________ Angle _________ Angle _________ Angle _________
Arm _________ Arm _________ Arm _________ Arm _________
Vertex _________ Vertex _________ Vertex _________ Vertex _________

2. Name the given angles in different ways.

a. P b. X c. L

1 2 3
Q Y M
R Z N

Carry On

Let’s sing

An acute angle is a little so small,
Right angle in the corner of a wall,
Obtuse angle at 2:50 in day-time,

Straight angle is a straw in soda-lime!
So many angles all around even in a mine!

Measuring an Angle 70 80 90 100 110
60 110 100 80 70 120
50 120 60 130
You might have seen an instrument in the shape of a 40 130 50 140
30 140 40 150
half circle in your geometry instrument box. We call 150 30
20 160 20 160
it a protractor. We use it to measure angles and also 10 170 10 170
0 180 0 180

Mathematics-5 183