Question

What is the supplement of an angle that measures 20 degrees?

Answer 1

`160˚`

Explanation:

Supplementary angles have a sum of `180˚`.

So, the supplement of a `20˚` angle can be found through asking the question:

"`20` plus what gives me `180`?"

This can be written algebraically as:

`20+x=180`

To solve this, subtract `20` from both sides.

`x=160`

Hence, the supplement of a `20˚` angle is a `160˚` angle.

This can be proven again, since `20+160=180`, and supplementary angles have a sum of `180˚`.