Question 419427
If you have a right triangle, the longest side MUST be the hypotenuse (that is, the side opposite the right angle).  In this case, if the triangle you have specified is a right triangle, then the side with the length of 9 MUST be the hypotenuse.

The Pythagorean Theorem states that {{{a^2 + b^2 = c^2}}} where c is the length of the hypotenuse and a & b represent the lengths of the other two sides.  So, if the lengths that you have in the problems fit into the formula, the triangle is a right triangle.  Let's see if that is the case:

{{{a^2 + b^2 = 6^2 + 8^2 = 36 + 64 = 100}}}

The length of the hypotenuse is 9 and {{{9^2}}} = 81 which is NOT 100.

Therefore the triangle is NOT a right triangle.