Question

Find the value of x.

Answer 1

`2√(77)`

Explanation:

Use the Pythagorean theorem.
`a^(2) +b^(2)=c^(2)`

a and b are the two side lengths

c is the hypotenuse (value across from the right angle)

Plug in the values that you are given.

`a^(2) +4^(2) =18^(2)`

Solve for x

`x^(2) =18^(2) -4^(2)`

`x^(2) =308`

x=
`√(308)`

`x=2√(77)`