Question

what is the measure of the unknown angle? n 80° o 180° o 100° o 80° o 10°

Explanation:

Step1: Recall angle - sum property

The two angles \(n\) and \(80^{\circ}\) form a straight - line, and the sum of angles on a straight line is \(180^{\circ}\). So, \(n + 80^{\circ}=180^{\circ}\).

Step2: Solve for \(n\)

Subtract \(80^{\circ}\) from both sides of the equation \(n + 80^{\circ}=180^{\circ}\). We get \(n=180^{\circ}-80^{\circ}\).

Answer:

\(100^{\circ}\)