Question

Which side lengths form a right triangle?

Answer 1

B
because
${1}^{2} + {8}^{2} = {( \sqrt{65}) }^{2}$

Answer 2

If you get a true statement when you simplify, then you do indeed have a right triangle! If you get a false statement, then you can be sure that your triangle is not a right triangle. Check out this tutorial and learn how use the Pythagorean theorem to see if a triangle is a right triangle!