Question

Is a triangle with sides of 9in, 25in, 24in a right triangle

Answer 1

Try the case if the triangle was a right triangle.
Then the longest side, 25, would be c or the hypotenuse.
9^2+24^2=25^2
81+576=625
657=625
This is not a true statement so the triangle is not a right triangle.

Hope this helps :)