Question

find the measure of angles 1 - 7 given that lines m and n are parallel and t is transversal. m∠1=□°

Explanation:

Step1: Identify angle - relationship

$\angle1$ and the $43^{\circ}$ angle are vertical angles.

Step2: Apply vertical - angle property

Vertical angles are congruent. So $m\angle1 = 43^{\circ}$.

Answer:

$43$