Question

Measures of some angles are given below. Find the measures of their complementary angles.

$78$${}^o$

Answer 1

$LetComplementaryanglebe{x}^o$

${\text{The sum of the complentary angles =90}}^o$

$\therefore x+78=90$

$x=90-78$

$x=12$

The Measure of a complementary angle of ${78}^o={12}^o$