Question

what true statement can you make about angle measures based on the diagram shown to the right?
choose the correct answer below
○ m∠1 = 2·m∠2
○ ∠1 ≅ ∠2
○ m∠1 - m∠2 = 90°
○ m∠1 + m∠2 = 180°

Explanation:

Step1: Identify angle relationship

Angles ∠1 and ∠2 are adjacent and form a straight - line.

Step2: Recall angle - sum property

The sum of angles on a straight - line is 180°. So, \(m\angle1 + m\angle2=180^{\circ}\).

Answer:

\(m\angle1 + m\angle2 = 180^{\circ}\) (the last option)