Afault that is formed when compression causes the hanging wall to move over the foot wall is a(n)

i'm sure the answer you are looking for would be

a. an ice age

hope this contact me if this didn't or you need with more answers : )

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