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

practice time 6e

1. Choose the correct option:

( a) A triangle has __________ parts.
(i) 2 (ii) 4 (iii) 6 (iv) 3
( b) A right-angled triangle can have _________ right angle(s).

(i) 0 (ii) 1 (iii) 2 (iv) 3
( c) The maximum number of acute angles a triangle can have is _________.
(i) 0 (ii) 1 (iii) 2 (iv) 3

( d) The number of obtuse angles a triangle can have is _________.
(i) 0 (ii) 1 (iii) 2 (iv) 3
( e) An equilateral triangle is also an/a _________.

(i) scalene triangle (ii) acute-angled triangle
(iii) right-angled triangle (iv) obtuse-angled triangle

2. Classify the following triangles.
( a) P ( b) D ( c) T
3 cm 4 cm

Q 4 cm 4 cm 4 cm
6 cm
R
E F U 4 cm V
4 cm
( d) X (e) Q P ( f) A
95° 90° 45° 25°

60° 25° 45° 125°
Y Z R B 30° C
circle

A circle is a simple closed figure made up of a curved line, whose each point is equidistant
from a fixed point in it.

Alternatively, we can say that a circle is the collection of all those points on a plane which
are at an equal distance from a fixed point.

The fixed point is called the centre of the circle.
Coins, bangles, wheels, etc. are some examples of

circles.
parts of a circle

There are different parts in a circle with special names.
Š Centre: The fixed point inside the circle which is at an equal distance from all points
on the circle is called the centre. Here, point O is the centre of the given circle.

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