Question

letters a, b, c, and d are angle measures. which should equal 105° to prove that f || g? a b c d

Explanation:

Step1: Recall angle - pair relationships

For two parallel lines \(f\) and \(g\) cut by a transversal \(n\), \(a\) and the \(75^{\circ}\) angle are supplementary.

Step2: Calculate supplementary angle

If two angles are supplementary, their sum is \(180^{\circ}\). So \(a = 180 - 75=105^{\circ}\).

Answer:

A. \(a\)