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\ 19-Nov-2025 Bharat Arora Proof-9 Reader’s Sign _______________________ Date __________

2. Classify the following triangles with respect to their sides:

a. B b. P c. T
3 cm 4 cm

3 cm 3 cm Q 4 cm
6 cm
R
A C U 4 cm V
3 cm
S
d. e. D f. G

3 cm 5 cm 4 cm 4 cm 5 cm 10 cm

E F H I
T 4 cm U 4 cm 9 cm
3. Classify the following triangles with respect to their angles:

A
a. Q P b. X c. 25°
90° 45°
95°
45°
60° 125°
25° 30°
R Y Z B C

R X
d. D e. f.
70° 20°
87°

130°
53° 40° 55° 55° 30°
E F S T Y Z
4. Identify the possible groups of angles of a triangle.

a. 30°, 90°, 60° b. 65°, 35°, 90° c. 80°, 75°, 35°

d. 40°, 80°, 60° e. 25°, 120°, 45° f. 50°, 60°, 40°

5. Identify the possible groups of sides of a triangle.
a. 4 cm, 3 cm, 7 cm b. 4 cm, 2 cm, 4 cm c. 5 cm, 6 cm, 8 cm

d. 7 cm, 4 cm, 8 cm e. 6 cm, 12 cm, 9 cm f. 5 cm, 5 cm, 10 cm

6. Choose the correct option.

a. The maximum number of acute angles a triangle can have is:

i. 0 ii. 1 iii. 2 iv. 3
b. The number of right angles a triangle can have is:

i. 0 ii. 1 iii. 2 iv. 3

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Geometry