Question

question 4 (1 point)
7)
? =

Explanation:

Step1: Use exterior - angle property

The exterior angle of a triangle is equal to the sum of the two non - adjacent interior angles.
Let the unknown angle be $x$. Here, $x$ is an exterior angle of a triangle with non - adjacent interior angles $30^{\circ}$ and $20^{\circ}$.

Step2: Calculate the angle

$x=30^{\circ}+ 20^{\circ}$

Answer:

$50^{\circ}$