Question

lines m and n are parallel. find the measure of ∠a. m∠a=?

Explanation:

Step1: Find the adjacent angle of \(124^{\circ}\)

Because the sum of adjacent angles is \(180^{\circ}\), so \(180^{\circ}-124^{\circ} = 56^{\circ}\)

Step2: Use the property of parallel lines

Since lines \(M\) and \(N\) are parallel, \(\angle a\) and the angle calculated in step1 are equal (corresponding angles). So \(\angle a=56^{\circ}\)

Answer:

\(56\)