Which of the following is caused by deep differences in cultural traditions among groups who now must share power?
A. Ethnic and cultural tensions
B. Ethnic diversity
C. Autocratic rule under a single party
O D. Theocracies and oligarchies

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