IF the two smaller sides squared and added together equal the third (longest side) squared then it IS a right triangle
First one:
2^2 + 15^2 = 17^2 ?????? If yes, it is a right trangle according to the Pythagorean Theorem...
4 + 225 = 289
229 does NOT equal 289 so the first one is NOT a right triangle....
can you do the rest of them? The third example seems like you may have too many numbers...or not enough spaces