Will the following angle measures form a triangle? 88 degree, 12degrees, 90degrees yes/no is yes what type and how?

The angles of a triangle always need to add up to 180 degrees.

190 is greater than 180, not equal, so these angles will not form a triangle.

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