Hi! i think it’s d, just by process of elimination!! it cant be any of the others, and d estimates to be right.
1/5 this shows that each can be picked up at Least 1/5 or 2/10
Mistake in Line 2 : Was in the determining the values for a ,b,c
Mistake in Line 4 : Not taking the square roots of both sides.
Step-by-step explanation:

First Mistake : Line 2

Second Mistake : Line 4

Correct Solution :


Vertical angles are congruent, so:
