Question

Write and solve an equation to find the complement of the angle that measure 42 degree

Answer 1

Complementary angles add up to 90 degrees.

So we can write:

42 + x = 90

To solve, subtract 42 to both sides:

x = 48

So the complement of a 42 degree angle is a 48 degree angle.

Answer 2

Complementary angles measures to the sum of 90 degrees. Since there is already an angle of 42 degrees, simply subtract 90 from 42, and you get 48 degrees...

angle A + angle B= 90 degrees, so

42 +x=90
x=48