Question

1. if two angles of a triangle measure 20 and 130 degrees, what is the measure of the third angle? 40° 30° 60° 50°

Explanation:

Step1: Recall the sum of angles in a triangle

The sum of the interior angles of a triangle is \(180^{\circ}\).

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

We know that \(20^{\circ}+130^{\circ}+x = 180^{\circ}\).

Step3: Solve for \(x\)

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Answer:

\(30^{\circ}\) (the second option)