Question

for the figure shown on the right, find m∠1. m∠1 = □°

Explanation:

Step1: Recall exterior - angle property

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

Step2: Identify non - adjacent interior angles

The non - adjacent interior angles to ∠1 are 63° and 65°.

Step3: Calculate m∠1

m∠1=63° + 65° = 128°

Answer:

128