Question

What is the complementary angle of 4/10
of a straight angle?

Answer 1

Answer:

First we need to find what is the 4/3 of 90°. 1). 2). ∴, the supplement of 4/3 of 90° is 60

Answer 2

4/10 of a straight angle (180°)= 72°

(Complementary angles are those angles whose sum is 90°)

90-72=18

∴ 18° is the complement of 72°