Question

Find x in this 45°-45°-90° triangle.



x =

Answer 1

use pythagorean's theorem. Both the legs measure the same, so you just need to find one.

Answer 2

so forget pythagorean's theorem, let's do it like this:

Answer 3

If the hypotenuse of a 45 triangle is equal to x times the square root of 2, then let's set 22 equal to x times the square root of 2 to solve for x. Like this: