Question

Question 1 (i)
Find the complement of each of the following angles:

Answer 1

When two angles add to ${90}^{\circ }$ , they are called as Complementary angles.
Complementary angle = ${90}^{\circ }$ - given angle
Complement of ${20}^{\circ }={90}^{\circ }-{20}^{\circ }={70}^{\circ }$ .