Question

which equation can be used to find the value of x?
x = 45 + 40
find the value of 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. In the given triangle, the exterior angle $x$ is equal to the sum of the two non - adjacent interior angles $45^{\circ}$ and $40^{\circ}$.

Step2: Calculate the value of $x$

$x=45 + 40$
$x = 85$

Answer:

$85$