Question

find the measure of the missing angle. the triangle has angles 20°, 130°, and ?.

Explanation:

Step1: Recall triangle angle sum

The sum of angles in a triangle is \(180^\circ\).

Step2: Let the missing angle be \(x\)

We have \(20^\circ + 130^\circ + x = 180^\circ\).

Step3: Solve for \(x\)

First, calculate \(20 + 130 = 150\). Then, \(x = 180 - 150 = 30\).

Answer:

The measure of the missing angle is \(30^\circ\).