Question

What is the supplement of a $70$ degree angle?

Answer 1

${110}^o$

Explanation:

Supplementary angle have a sum of ${180}^o$

Thus, if $\angle 1$ and $\angle 2$ are supplementary,

$m\angle 1+m\angle 2=180$

We know that $m\angle 1=70$ and we want to find $m\angle 2$

$70+m\angle 2=180$

Subtract $70$ from both sides.

$m\angle 2=110$

Thus, a ${70}^o$ angle and a ${110}^o$ angle are supplementary of one another.