Question

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

Explanation:

Step1: Identify the relationship

Since lines M and N are parallel and cut by a transversal, the corresponding angles are equal.

Step2: Determine the measure of ∠a

The angle of \(99^\circ\) and \( \angle a\) are corresponding angles. By the Corresponding Angles Postulate, \( m\angle a = 99^\circ\).

Answer:

99