## anonymous one year ago help i will fan and medal answer already solved need to figure out out how she got the numbers

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1. anonymous

I sort of said it wrong it's not slope I always just got to slope be you would use pathegorean theorem for the two sides so 3^2+4^2=c^2 so the length would be root 13 so the perimeter would be root 13 + root 13 +6+6 12+2sqrt13

2. anonymous

someone already helped me on this but idk where she got the numbers from

3. anonymous

this is the equation she solved find the perimeter of the shape

4. anonymous

@Skielerlucas04 can you help or do you know anyone who can

5. anonymous

6. anonymous

7. anonymous

8. anonymous

9. anonymous

wish i could help

10. anonymous

oh it thanks but do you know any that can help me

11. anonymous

jim_thompson5910

12. anonymous

@jim_thompson5910

13. anonymous

i think she got the numbers from the points but used slope intercep form to find the length of the sides

14. anonymous

so how did she get the numbers from slope intercept

15. jim_thompson5910

Focus on the right triangle I have drawn in red. This triangle has legs of 2 and 3.

16. jim_thompson5910

a = 2 b = 3 c = unknown a^2 + b^2 = c^2 2^2 + 3^2 = c^2 solve for c to get c = ???

17. anonymous

15

18. anonymous

sorry 12

19. jim_thompson5910

nope on both

20. anonymous

13

21. jim_thompson5910

2^2 + 3^2 = c^2 4 + 9 = c^2 c^2 = 13 c = ??

22. anonymous

what do i do with 13

23. anonymous

13 times 13 is 169

24. jim_thompson5910

the opposite actually, you take the square root of 13

25. jim_thompson5910

$\Large c = \sqrt{13}$

26. anonymous

that 3.605551275

27. anonymous

4

28. jim_thompson5910

The length of AB is $$\Large \sqrt{13}$$ units long. The same reasoning applies to CD.

29. anonymous

or 4 lol

30. anonymous

i got 4 for CD

31. anonymous

@jim_thompson5910

32. jim_thompson5910

CD is the same length as AB

33. anonymous

but how did she get 19

34. jim_thompson5910

both are exactly sqrt(13) units long they are approximately 3.60555127546399 units long

35. jim_thompson5910

I don't see any 19

36. anonymous

like what IIIIIIIIIIIIIIIIII said

37. anonymous

12+2sqrt13 equals 19

38. jim_thompson5910

I'd have to see the full problem + instructions

39. anonymous

40. jim_thompson5910

Oh nvm, you're looking for the perimeter

41. jim_thompson5910

two sides are 6 6+6 = 12

42. jim_thompson5910

the other two sides are $\Large \sqrt{13}$

43. jim_thompson5910

$\Large \sqrt{13}+\sqrt{13} = 2\sqrt{13}$

44. anonymous

how are they 6

45. jim_thompson5910

Perimeter = $$\Large 12+2\sqrt{13} \approx 19.2111025509$$ which rounds to 19

46. jim_thompson5910

47. jim_thompson5910

you just count the spaces for the horizontal or vertical segments

48. anonymous

oh ok

49. jim_thompson5910

|dw:1437692895844:dw|

50. anonymous

were is 13 from

51. jim_thompson5910

|dw:1437692932875:dw|

52. jim_thompson5910

it's not just 13. It's the square root of it

53. anonymous

why cant it be sqrt 12 or another number why is it 13

54. jim_thompson5910

because that's what you get when you solve for c in 2^2 + 3^2 = c^2

55. jim_thompson5910

it's $$\sqrt{13}$$ and NOT 13

56. anonymous

i know

57. anonymous

@hershey21

58. anonymous

yep

59. anonymous

idk lol