Question

what is m∠1? 76° 40° 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 two non - adjacent interior angles to $\angle1$ are $76^{\circ}$ and $40^{\circ}$.

Step3: Calculate $\angle1$

$m\angle1=76^{\circ}+ 40^{\circ}$

Answer:

$116$