Question

points a, b, and c are on line ac. angle cbd has a measure of 140°. what is the measure of angle abd? 40° 50° 60° 70°

Explanation:

Step1: Recall linear pair property

Angles in a linear pair sum to \(180^\circ\). So, \(\angle ABD + \angle CBD = 180^\circ\).

Step2: Substitute \(\angle CBD = 140^\circ\)

\(\angle ABD = 180^\circ - 140^\circ = 40^\circ\).

Answer:

\(40^\circ\)