Question

Find the unknown angle measure.
Given 78 degrees
63 degrees
Solve for x

Answer 1

39°

Explanation:

If it gives you 2 angles and asks for x, you know it has 3 angles. So the shape is a triangle. All 3 angles in a triangle add up to 180°.

So add 78 and 63 which equals 141

`78+63=141`

And to find x, subtract 141 from 180 because 180 is the total.

`180-141=39`

So the answer is 39