Question

if ∠adi measures 51° what is the measure of ∠edj? a) 51° c) 41° b) 39° d) 49°

Explanation:

Step1: Identify vertical - angles

Vertical angles are equal. $\angle ADI$ and $\angle EDJ$ are vertical angles.

Step2: Determine the measure of $\angle EDJ$

Since $\angle ADI = 51^{\circ}$ and $\angle ADI=\angle EDJ$ (vertical - angles property), then $\angle EDJ = 51^{\circ}$.

Answer:

A. $51^{\circ}$