Andrew claims that a wooden bookend in the shape of a 45°- 45°- 90° right triangle has side lengths of 9 in., 9 in., and 11 in. Is he correct?
No; if the sides of the right angle are 9 in. long each, then the hypotenuse would need to be over 12 in.
According to the Pythagorean Theorem
for a right triangle with sides
For the given non-hypotenuse sides:
but Andrew claims