Answer:
The value of r is 3
Step-by-step explanation:
To start out with, assuming that this is an isosceles triangle, we can cut it down the middle, and get two congruent right traingles. Because it is congruent, that means theoretically, 3r+26 and 4r+23 must be equal. So we set them equal.
3r+26=4r+23
-26
3r=4r-3
-4r
-r=-3
/-1
r=3
So, we can now say that r is equal to 3.
