The triangle is a right triangle if the lengths of its sides satisfy the Pythagorean theorem: <em>if the square of the length of the longest side is equal to the sum of the squares of the lengths of the other two sides</em>.
multiply 34 by 2 (because there is 2 sides), and multiply 2 by 2 (because there is 2 sides), and you'll get 68 and 4. add them together, and you'll get 72.
