Question

What is the length of stack E C with bar on top in the rectangular prism? Round to the nearest tenth of a centimeter.

Answer 1

hint: we can write the subsequent formulas:
\[\Large \begin{gathered}
EC = \sqrt {E{G^2} + G{C^2}} \hfill \\
E{G^2} = E{F^2} + F{G^2} \hfill \\
\end{gathered} \]
since I have applied the theorem of Pitagora twice

Answer 2

is it D

Answer 3

that's right!

Answer 4

Thanks again!

Answer 5

Thanks!