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2. Find the degree measures of the following angles using a protractor.

(a) (b) J (c)
I A

J
B

G K C
H
d
3. Estimate the measures of the angles marked as a, b, c, d, e and f in the figure. Verify a b c
your estimation using a protractor. Hence, arrange the angles in ascending order.
4. Look at the given figure and write the measures of the angles: f e

(a) ∠POQ (b) ∠POR (c) ∠UOS (d) ∠TOQ (e) ∠ROS

5. There are 20 spokes in the wheel of a cycle. Find the degree measure of the angle
formed between the successive spokes.
6. Using a protractor, find the measures of the angles in each of the following triangles.

(a) (b)
1 1

2 3 2 3

(c) 1 3 (d) 1

2
2 3
Complete the table given below.

Triangle Measure of ∠1 = Measure of ∠2 = Measure of ∠3 = ∠1 + ∠2 + ∠3 =
(a)

(b)

(c)

(d)

What do you observe?

45 Lines and Angles