Question

Find the value of x?. If your answer is not an integer, leave it in simplest radical form. The diagram is not drawn to scale.

Answer 1

I tried this:

Explanation:

I think that being a right triangle we can use Pythagoras Theorem to get:

`18^2=x^2+9^2`

rearrangng

`x=sqrt(18^2-9^2)=sqrt(324-81)=sqrt(243)=sqrt(81*3)=sqrt(81)sqrt(3)=9sqrt(3)`