Question

follow the steps to find the area of the shaded region. the height (h) is needed to find the area of the triangle. some imaginary lines have been drawn to help find it. start by find the measure of angle x. angle x = ?°

Explanation:

Step1: Recall angle - sum property of a circle

The sum of angles around a point is 360°.

Step2: Set up the equation

We know one angle is 129°. Let the unknown angle be \(x\). So, \(x + 129^{\circ}=360^{\circ}\).

Step3: Solve for \(x\)

Subtract 129° from both sides of the equation: \(x=360^{\circ}- 129^{\circ}\).
\(x = 231^{\circ}\)

Answer:

231