Question

PLEASE HELP - Find the value of the variable(s). If your answer is not an integer, leave it in simplest radical form. The figure is not drawn to scale.

Answer 1

\[18^{2} - 9^{2}=x^{2}\]

Answer 2

We have :
\[x^2+9^2=18^2\]
so :
\[x^2=18^2-9^2=243\]
hence :
\[x=\sqrt{243}\]

Answer 3

@Nick_Black Here are the answers:
A. 9 sqrt 3
B. 18 sqrt 3
C. 2
D. 1/2

Answer 4

\[x=\sqrt{243}=\sqrt{81\times3}=9\sqrt3\]