Question

Find the value of x in this figure. Explain your reasoning.

Answer 1

x=
`3`

`3^(2) +x^(2) =`
`18`

⇒
`x^(2) =18-3^(2)`

⇒
`x^(2)`=
`18-9`

⇒
`x^(2)`=
`9`

⇒
`x`=√
`9`

⇒
`x=3`