Well let’s break this down.
The “congruence relationship” indicates that the the figures specified in the questions are “congruent” or the same in size, length, shape, etc.
So question 4...
First off, line GF is congruent to line RA
GF = RA
GF= y-3
RA = 10
y-3 = 10
Add 3 to each side
y = 13
Therefore, 13- 3= 10
