Question

which equation can be used to find the value of x? x = 60 + 40 find the value of x. x = ?

Explanation:

Step1: Apply exterior - angle property

The exterior - angle of a triangle is equal to the sum of the two non - adjacent interior angles. Here, $x$ is an exterior angle of the triangle with non - adjacent interior angles $40^{\circ}$ and $60^{\circ}$. So, $x = 40+60$.

Step2: Calculate the value of $x$

$x=40 + 60=100$.

Answer:

$x = 100$