Question

a side of the triangle below has been extended to form an exterior angle of 128°. find the value of x.
answer attempt 1 out of 2
x =

Explanation:

Step1: Recall exterior - angle property

The exterior angle of a triangle is equal to the sum of the two non - adjacent interior angles. So, $128^{\circ}=x + 106^{\circ}$.

Step2: Solve for x

$x=128 - 106$.

Answer:

$22$