Question

fill in the blank if the (mangle5 = 47^{circ}) then the measure of (mangle1 =?)

Explanation:

Step1: Identify angle - pair relationship

$\angle5$ and $\angle1$ are corresponding angles.

Step2: Apply corresponding - angles postulate

If two parallel lines are cut by a transversal, corresponding angles are congruent. Given $m\angle5 = 47^{\circ}$, then $m\angle1=m\angle5$.

Answer:

$47^{\circ}$