## katlin95 2 years ago help!!! please? Find the perimeter of the kite below, round to the nearest hundredth A. 38.8 cm B. 26 cm C. 80 cm D. 19.4 cm

1. katlin95

2. hartnn

u know pythagoras theorem ?

3. katlin95

yes a little bit, but not much?

4. hartnn

in triangle QYZ, can you apply pythagoras theorem and find side YZ ?

5. katlin95

alright I got 26 as an answer is that right?

6. hartnn

nopes, 26 as perimeter or YZ=26 ? anyways both are incorrect. show your work , how u got 26 ?

7. hartnn

|dw:1356337389904:dw|

8. hartnn

^pythagoras theorem.

9. katlin95

okay I got 169 takeing 5^2+12^2 ad i got 169 now what?

10. hartnn

thats correct, but thats c^2 =169 so, $$c=\sqrt{169}=..?$$

11. katlin95

13!

12. hartnn

yes, good! now apply pythagoras in triangle XQY and find XY=...?

13. katlin95

i dont get what you mean, could u apply a problem for me to solve?

14. hartnn

i'll draw that triangle....

15. katlin95

ok

16. hartnn

|dw:1356337770524:dw|

17. hartnn

now can u find XY =.. ?

18. katlin95

yup hold o

19. katlin95

where x and wheres y?

20. hartnn

|dw:1356338023630:dw|

21. hartnn

its the same thing u did earlier, put a=4, b=5, find c

22. hartnn

$$c^2=4^2+5^2 \\c=...?$$

23. katlin95

wouldnt it be ?A

24. hartnn

how ?

25. katlin95

6.4+6.4+13+13=38.8, because were fiding the perimeter

26. hartnn

thats correct! good work :)