Answer:
A
Step-by-step explanation:
We can cross out the two sides that are the same in both shapes.
so that leaves the hypotenuse of 253 and the sides 231 & 104 of the square.
Because 253 is close to 231, it can be cancelled out and that leaves out the 104.
But we can take 20 away from the ~250 and ~230
100-20 is about 80
