Question

Find the length of the hypotenuse of a 45°- 45°-90° triangle with a leg of 8.

Answer 1

\[8\sqrt{2}\] The hypotenuse of a 45-45-90 triangle is always square root of 2 times the length of the leg.

Answer 2

You can remember this useful fact as follows: when you see a 45/45 right triangle (a square cut down the diagonal), think: "Boo-boo-boo, the square root of two!"