So this is going to be square root of 2, sorry, square root of 2 over 2 times the hypotenuse. Square root of 2 over 2 times the hypotenuse. And you can get that straight from the Pythagorean theorem. If this side, let's say it's length a, then this side has length a, so you're going to have a squared plus a squared is equal to the hypotenuse squared, or 2a squared is equal to the hypotenuse squared, or that a squared is equal to the hypotenuse squared over 2, or that a is equal to h over the square root of 2, which is the same thing as the square root of 2h over 2. I just rationalized the denominator, multiplied both the numerator and the denominator by square root of 2. So that's where I got this from. And so what is the area going to be?