Question

A supplementary angle is split into 2 angles. One angle is 2x + 20°. The other angle is 40°. Solve for x and find the measurement of the missing angle.

Answer: x =

Answer: the missing angle = º

Answer 1

A supplementary angle means 180 degrees

2x + 20 = 40

2x = 40- 20

2x = 20

x = 10

The first angle is = 2(10) + 20

= 20 + 20

= 40 degrees

Therefore

x = 10

First Angle = 40