Answer:
B: right
Step-by-step explanation:
9^2 + 12^2 = 15^2
Formula for right triangles is Shorter side A x Shorter side A + Shorter side B x Shorter Side B = Longest side +Longest side
9 x 9 = 81
12 x 12 = 144
144 + 81 = 225
15 x 15 = 225 so it is a right triangle.
