The supplement of an angle is 20 more than the measure of the angle itself. How do you find the angle?

Nov 28, 2016

The angle is 80°

Explanation:

An angle and its supplement make 180°

Let the angle itself be $x$.
It's supplement is 20° more $\rightarrow x + 20$

Together they make 180°

$x + x + 20 = 180$

$2 x + 20 = 180$

$2 x = 160$

$x = 80$

The angle is 80°
The supplement is 100°