Question

How do you do this?

Answer 1

Legs:
`x`

Hypotenuse:
`√(2)\cdot x`

Explanation:

In this case, a 45-45-90 right triangle is a right triangle whose legs have the same length and hypotenuse is
`√(2)` times the length of any of the legs. Then, the dimensions of this triangle are, respectively:

Legs:
`x`

Hypotenuse:
`√(2)\cdot x`