#### Answer

$4\sqrt{3}$

#### Work Step by Step

We use the theorems in the chapter to obtain:
$(CD+ED)CD = FC^2 \\ FC= \sqrt{(8+4)(4)}=\sqrt{48} = 4\sqrt{3}$

Published by
Brooks Cole

ISBN 10:
1439047901

ISBN 13:
978-1-43904-790-3

$4\sqrt{3}$

You can help us out by revising, improving and updating this answer.

Update this answerAfter you claim an answer you’ll have **24 hours** to send in a draft. An editor
will review the submission and either publish your submission or provide feedback.