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\ 08-Oct-2025 Bharat Arora Proof-9 Reader’s Sign _______________________ Date __________

interior and exterior of an angle B

Consider ∠AOB shown in the figure. Take a point P on ray OA R
and a point R on ray OB . We say that the points P and R lie S
on ∠AOB. M
Mark two points M and N inside ∠AOB and two points S and N

T outside ∠AOB.
We say that M and N lie in the interior of ∠AOB and S and T O T P A
lie in the exterior of ∠AOB.
Be Aware
Š The points lying inside the angle form the interior of Points on the angle—These
the angle. are the points that lie on the
Š The points lying outside the angle form the exterior of two rays (or arms) that form
the angle. the angle.

practice time 6B

1. Which of the following figures show an angle?

( a) ( b) ( c) ( d)

2. Name the following angles.

( a) ( b) ( c) M ( d)
P X Z E
N
L
F G
Q R Y
3. Complete the following table.
Angle Arms Vertex Name of the angle

(a)
P
T

O
(b) S

U

N
(c) T

O P

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