Question

what is the measure of ∠x? 90° 100° 80° 40°

Explanation:

Step1: Recall linear pair property

A linear pair of angles sums to \(180^\circ\).

Step2: Calculate \( \angle x \)

We know one angle in the linear pair is \(80^\circ\), so \( \angle x = 180^\circ - 80^\circ = 100^\circ \).

Answer:

\(100^\circ\) (corresponding to the option "100°")