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## nikki156789 3 years ago 26. Calculate the perimeter of triangleDEF �������� a. 39.28 b. 40.32 c. 45.82 d. 72

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1. phaizzpham

is there like an image you could draw out?, it would make it simpler if there is an image

2. nikki156789

|dw:1332541848602:dw|

3. nikki156789

what does the degree?

4. nikki156789

ok?

5. nikki156789

myko that comes out to not an option

6. nikki156789

it comes out to 42

7. phaizzpham

this one is a tricky one let me try again

8. myko

|dw:1332542529410:dw| what this means?

9. phaizzpham

yeah that is throwing us off

10. nikki156789

idk which is why i dont understand it

11. myko

actualy, my bad, there is no solution i guess with the info you have

12. phaizzpham

r u positive that it is a t?

13. nikki156789

no its like an angle thing with a line through it.

14. phaizzpham

ahh thats means perpendicular i would think

15. myko

maybe it means that this top angle is half of the bottom ones?

16. nikki156789

idk which is why im having trouble doing this problem

17. phaizzpham

ive done that and i figured out the height which is six, but idk how to apply it to figure out the parameter

18. SUROJ

|dw:1332543779552:dw|

19. phaizzpham

i think the answer is 40.32

20. SUROJ

any reason behind that?

21. nikki156789

SUROJ be nice

22. nikki156789

how'd you get 40.32?

23. phaizzpham

|dw:1332543858044:dw| well i tried to find the height which is 12 using the h=root3*s/2 formula, then i cut the triangle in half, then applied the A^2+B^2=C^2 to find one of the sides which is 13.89 then added all of them together which is 2*13.89+14 which is 41.78 so it could be 40.32 lol

24. nikki156789

oh ok:)

25. phaizzpham

i could be wrong tho D:

26. nikki156789

:/

27. SUROJ

is that equilateral triangle?

28. phaizzpham

yeah it should be

29. nikki156789

i dont think so

30. nikki156789

no its not cuz only two sides are the same

31. phaizzpham

or an isolyze triangle ?

32. nikki156789

its an isosceles triangle

33. SUROJ

yes

34. phaizzpham

okay let me try again lol

35. nikki156789

ok

36. nikki156789

|dw:1332545361479:dw|

37. SUROJ

72

38. nikki156789

thats the 2nd triangle

39. nikki156789

so the perimeter of def is 72?

40. SUROJ

wait that is 42.8

41. SUROJ

yea the perimeter

42. SUROJ

sorry 45.8

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