Question

What is the complementary angle of ${18}^{\circ }$?

• A. ${70}^{\circ }$
• B. ${72}^{\circ }$
• C. ${162}^{\circ }$
• D. ${90}^{\circ }$

Answer 1

The correct option is B ${72}^{\circ }$

An angle and its complementary angle sums to ${90}^{\circ }$.
Complementary angle of ${18}^{\circ }$ = ${90}^{\circ }$ - ${18}^{\circ }$ = ${72}^{\circ }$.