Chapter 2 – Angles
Practice set 2
1. Look at the figure alongside and name the following:
Measure of angle
(1) 180°
(2) 240°
(3) 360°
(4) 0°
Type of angle
(a) Zero angle
(b) Straight angle
(c) Reflex angle
(d) Complete angle
Ans:
Measure of angle
(1) 180°
(2) 240°
(3) 360°
(4) 0°
Type of angle
(a) Zero angle
(b) Straight angle
(c) Reflex angle
(d) Complete angle
2. The measures of some angles are given below. Write the type of each angle.
(1) 75°
Ans: Acute angle
(2) 0°
Ans: Zero angle
(3) 215°
Ans: Reflex angle
(4) 360°
Ans: Complete angle
(5) 180°
Ans: Straight angle
(6) 120°
Ans: Obtuse angle
(7) 148°
Ans: Obtuse angle
(8) 90°
Ans: Right angle
3. Look at the figures below and write the type of each of the angles.
Ans:
(a) Acute angle
(b) Right angle
(c) Reflex angle
(d) Straight angle
(e) Zero angle
(f) Complete angle
4. Use a protractor to draw an acute angle, a right angle and an obtuse angle.
Ans:
Acute angle:
Right angle:
Obtuse angle:
Practice set 3
Use the proper geometrical instruments to construct the following angles. Use the compass and the ruler to bisect them.
(1) 50°
Ans:
(2) 115°
Ans:
(3) 80°
Ans:
(4) 90°
Ans:
