What is the study of the Earth's surface, the connections between places, and the relationships between people and their environment.

show options, then i will gladly answer you question.

have a good day.

heat from the core of the earth causes convection currents to occur in the mantle. these currents slowly move the crust around.

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