1. Fill in the blanks.
(a) Right angle = ……………… degrees.
(b) An obtuse angle is more than a ………………. angle.
(c) 2 × Right angle = ……………… degrees.

2. What measure (in degrees) should be added to the following to make them a right angle?
(a) 34° ………………..
(b) 16° …………………
(c) 19° ………………….
(d) 28° …………………
(e) 78° …………………
(f) 38° …………………
(g) 84° ………………..
(h) 90° …………………

 3. Identify the following angles as acute, obtuse or right angles:
(a) 3 degrees — ………………………
(b) 12 degrees — ……………………..
(c) 72 degrees — ……………………..
(d) 165 degrees — ……………………
(e) 90 degrees — …………………….
(f) 60 degrees — …………………….
(g) 61 degrees — ……………………..
(h) 91 degrees — ………………….
(i) 89 degrees — …………………..
(j) 179 degrees — ………………….