## anonymous one year ago Find the perimeter of the figure. Round your answer to the nearest tenth. http://scde.mrooms.org/file.php/2247/Images/Ch11Test/11_2.JPG

1. anonymous

2. anonymous

use the pythagorean rule to fine the "slanted sides", or hypotenuses |dw:1437004754288:dw|

3. anonymous

the perimeter is the addition of all sides so, once you get those hypotenuses by using the pythagorean theorem sum them all up, and that's the perimeter of the figure :)

4. anonymous

5. anonymous

@jdoe0001

6. anonymous

well.. what did you get for the hypotenuses?

7. anonymous

500 and 404

8. anonymous

9. anonymous

right one sec

10. anonymous

$$\bf c^2=a^2+b^2\implies c=\sqrt{a^2+b^2}\impliedby \textit{pythagorean theroem} \\ \quad \\ \textit{left triangle hyp}=\sqrt{2^2+20^2}\to \sqrt{404} \\ \quad \\ \textit{right triangle hyp}=\sqrt{10^2+20^2}\to \sqrt{500}$$

11. anonymous

thus $$\bf \textit{perimeter}=2+19+10+\sqrt{500}+19+\sqrt{404}$$

12. anonymous

I got 54.2 @jdoe0001

13. anonymous
14. anonymous

so its 92.46

15. anonymous

well. I used 50 because.... 19 + 19 = 38 38 +2 = 40 40 + 10 = 50

16. anonymous

but yes, 92.46

17. anonymous

the nearest tenth will be ... notice, a "6" after the 4, so the 4 rounds up to 50 or 92.5

18. anonymous

thanks !