If you are attempting to correlate rock strata and find that rock layer in different parts of the world have different sediment type

a. if they have the same thickness
b if they contain the same fossil
c if they are the same color
d if they have the same mineral in them

answerthe above statement is correct(true)

answer called a epicycle;

the answer would be the third option, "no, ariel should have added 9^2 and 12^2 and compared that to 15^2."

this is found through the pythagorean theorem, which is a^2 + b^2 = c^2.

this is the correct way of solving the problem:

9^2 + 12^2 = 15^2

81 + 144 = 225

225 = 225