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e. f.
180 0 180 0
170 10 170 10 80 90
70 90 100 110
160 20 160 20 60 110 100 80 70 120
50 120 60 130
30 150
150 30 130 50
40 140 40 140
140 40 140 40
30 150
50
130
130 50 150 30
60 120
120 70 80 110 100 60 20 160 20 160
110 100 90 80 70
10 170 10 170
90
180 0
0 180
2. use a protractor to measure each angle.
A S
a. b. P c. d. G

B C Q R T U O D
∠ABC = _____ ∠PQR = _____ ∠STU = _____ ∠GOD = _____

3. Draw the following angles using a protractor.

a. 40° b. 50° c. 75° d. 125° e. 142°

f. 25° g. 175° h. 120° i. 90° j. 165°

TYPeS of AngleS

There are different types of angles. Let us study them.

1. Acute angle: An angle whose 2. right angle: An angle whose
measure is between 0° and 90° is measure is 90° is called a right
called an acute angle. angle.

In the following figure, ∠ABC = 50°. In the following figure, ∠ABC = 90°.

A A

50° 90°
B C
Acute angle B C
Right angle
Thus, ∠ABC is an acute angle. Thus, ∠ABC is a right angle.

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Geometry