Question

find the measure of angle 6.

Explanation:

Step1: Identify vertical - angle relationship

Vertical angles are equal. Angle 6 and the 99 - degree angle are vertical angles.

Step2: Determine angle 6 measure

Since vertical angles are congruent, the measure of angle 6 is equal to the measure of the 99 - degree angle.

Answer:

$99^{\circ}$