The triangle that has side lengths of 7, 10, and 12 is not a right triangle. The correct answer is B. No.
The reason for this can be found in the Pythagorean theorem, which is a2 + b2 = c2 (this number 2 means square)
So, let's test this.
77 + 1010 = 12*12
49+100 = 144
149 = 144
Since this is not equal, this isn't a right triangle.
