anonymous 3 years ago What is the length of EF in the right triangle below? A. 468 B. 180 C. 30 D. √468 E. √180 F. 6 (Picture below.)

1. anonymous

2. anonymous

18^2-12^2=x^2... i dont have a calculator :P

3. anonymous

$a^{2}+b^{2}=c^{2}$ $12^{2}+b^{2}=18^{2}$ $144+b^{2}=324$ $b^{2}=324-188$ $b^{2}=180$ $\sqrt{b}=\sqrt{180}$ $b=6\sqrt{5}$

4. anonymous

Oops, correction: $b^{2}=324-144$

5. anonymous

Everything else is correct.

6. anonymous

SO, $6\sqrt{5}=\sqrt{180}$

7. anonymous

Thank you sooooo much! :D