Question

What is the measure of complementary angle of ${83}^{\circ }$?
(1) $7^{\circ }$
(2) ${17}^{\circ }$
(3) ${27}^{\circ }$.

Answer 1

We know, two angles are complementary when they add up to ${90}^o.$

Given, measure of one complementary angle is ${83}^o.$

$\Rightarrow$ Measure of other complementary angle $={90}^o-{83}^o$ $=7^o.$

$\therefore$ Measure of a complementary angle of ${83}^o=7^o$.

Therefore, $\left(1\right)$ $7^o$ is correct.