Question

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

Step3: Calculate $m\angle1$

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

Answer:

$116$