Question

Geometry help please

Answer 1

its not \[\sqrt{405}\] thats what i got the first time which isn't right

Answer 2

its 9 radical 3

Answer 3

\[a^2 + b^2 = c^2\]
\[9^2 + b^2 = 18^2\]

Answer 4

\[81 + b^2 = 324\]
\[b^2 = 243\]
\[\sqrt{b^2 } = \sqrt{243}\]
\[b = 9\sqrt{3}\]

Answer 5

@vivianrush do you understand?

Answer 6

yes i do. thank you