Question

a side of the triangle below has been extended to form an exterior angle of 128°. find the value of x. answer attempt 2 out of 4

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, \(128^{\circ}=106^{\circ}+x^{\circ}\).

Step2: Solve for \(x\)

Subtract \(106^{\circ}\) from both sides of the equation: \(x = 128 - 106\).

Answer:

\(x = 22\)