Question

find the value of x.
x = 0

Explanation:

Step1: Use the exterior - angle theorem

The exterior - angle theorem states that the measure of an exterior angle of a triangle is equal to the sum of the measures of the two non - adjacent interior angles.
So, \(x + 45=126\)

Step2: Solve for \(x\)

Subtract 45 from both sides of the equation: \(x=126 - 45\)

Answer:

\(x = 81\)