15.20 25
Does it form a triangle

1."lessen the worth of ."

2."increase the worth of."

3." beyond the worth of."

4."against the worth of ."

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