Question

Using the Triangle Sum Theorem. Determine the angle measure

of <1.
38
31
(78 and 31 degrees)

Answer 1

71 degrees

Explanation:

Hi there!

The sum of the interior angles of a triangle is always 180 degrees.

Knowing this, to solve for the measure of angle 1, subtract 78 and 31 degrees from 180:

180-78-31

= 71

Therefore, angle 1 measure 71 degrees.

I hope this helps!