Question

problem 8: spiral review determine the missing angle measure in the isosceles triangle. show or explain your thinking.

Explanation:

Step1: Recall angle - sum property of triangle

The sum of interior angles of a triangle is 180°. Let the measure of each of the missing angles be \(x\).

Step2: Set up an equation

We know that \(120 + x+x=180\), which simplifies to \(120 + 2x=180\).

Step3: Solve the equation for \(x\)

Subtract 120 from both sides: \(2x=180 - 120\), so \(2x = 60\). Then divide both sides by 2: \(x=\frac{60}{2}=30\).

Answer:

30°