Question

write the complement of the following angle 59°

Answer 1

two angles whose sum is 90° are called compelementary angles .

let the missing angle be x

2nd angle given = 59

hence,

x+59= 90

x= 90-59

x=31

hope it helps :)

Answer 2

the sum of two complement angle is equal to 90 degree

let it's complementary angle be x

so
$59 + x = 90 \\ \\ 90 - 59 = x \\ = 31$