Exercise 1.3 (Angles)

Exercise 1.3

1. The angles below 90° are called as acute angles.

2. The angles above 90° are alled as obtuse angles.

3. A straight angle is formed by joining two consective right angles.

4. The obtuse angle in ∆ABC is ∠C

a) ∠A

b) ∠B

c) ∠C

5. Hand of a clock at 3.20 shows acute angle.

6 In the following letters, which one forms the right angle?

a) L

b) K

c) Z

d) N

Answer: a) L

7. Circle the right angle.

8 The angle shown in this picture is 90⁰

a. more than 120°

b. Less than 45°

c. more than 180°

d. 90°

9. The angle formed by the nail cutter is acute angle.

10. Name the angles formed when, the vessels are lifted by tongs in the kitchen.

Answer: Acute angle.