Question

what is m∠1? m∠1 =

Explanation:

Step1: Recall exterior - angle property

The measure of an exterior angle of a triangle is equal to the sum of the measures of the two non - adjacent interior angles.

Step2: Identify non - adjacent interior angles

The two non - adjacent interior angles to ∠1 are 52° and 69°.

Step3: Calculate m∠1

m∠1=52° + 69° = 121°

Answer:

121