## gabbyalicorn one year ago https://www.dropbox.com/s/6ddn1ek45arbixk/Screenshot%202015-06-03%2014.24.14.png?dl=0

1. gabbyalicorn

wait no ignore that

2. gabbyalicorn

dont click on it

3. gabbyalicorn

What is the surface area of the prism? @rainbow_rocks03 @Black_ninja123

4. rainbow_rocks03

What do you think the answer is?

5. gabbyalicorn

wait the area is 2 bh x wl or something like that?

6. rainbow_rocks03

well solve that then

7. gabbyalicorn

so it is that? formula

8. gabbyalicorn

@rainbow_rocks03

9. gabbyalicorn

so 6x 10 x 9 x 8 ? i dont know HELP!

10. gabbyalicorn

@rainbow_rocks03 @Black_ninja123

11. gabbyalicorn

HELP!

12. Black_ninja123

One sec I have to find the formula

13. gabbyalicorn

kk

14. Black_ninja123

Do you know what kind of prism is this?

15. gabbyalicorn

triangular

16. gabbyalicorn

am i right?

17. Black_ninja123

Let me tag some people

18. Black_ninja123

@Mehek14

19. Black_ninja123

@Love_Ranaa

20. gabbyalicorn

i just need to know where the base height width and length is and how to times it.

21. Black_ninja123

I dont't know the formula

22. Black_ninja123

don't*

23. gabbyalicorn

@geerky42 @sammixboo

24. gabbyalicorn

@Science_ALLY @pinklion23

25. gabbyalicorn

@is3535

26. Black_ninja123

@phi

27. phi

there are 5 faces. the triangle face closest to us is a right triangle. can you find its area using 1/2 base * height ?

28. gabbyalicorn

is the base byd and the hieght 10yd?

29. phi

you want the bottom line that goes sides and the line that goes straight up (not the hypotenuse)

30. phi

*sideways

31. gabbyalicorn

so, 8yd and 10yd?

32. phi

8 goes straight up. which line goes sideways?

33. phi

you want the "legs" that form the right angle (see the little square in the corner?)

34. gabbyalicorn

9?

35. gabbyalicorn

yes i see it

36. phi

what are the lengths of those two legs?

37. gabbyalicorn

9 and 8?

38. phi

the marked legs are the base and the height of the right triangle

39. gabbyalicorn

6= base hieght = 8

40. phi

now can you find its area ?

41. gabbyalicorn

6 x 8 x 2 = 96 / 2 = 48

42. phi

why did you put in the extra 2 ?

43. gabbyalicorn

cuz sometimes when people like teach me they put in the 2 and then im like well i should do that for everything now.

44. phi

Let's go slow and find the area of just the one face, the triangle with base 6 and height 8 the formula is 1/2 * base * height what do you get ?

45. gabbyalicorn

48

46. phi

base * height is 6*8 = 48 but now multiply by 1/2

47. gabbyalicorn

96

48. phi

48 times 1/2 means 48/2 (it is not 96)

49. gabbyalicorn

oh, then 24

50. phi

yes. next the "back triangle" is the same area, it is also 24 so the front and back add up to 24+24= 48 now we have to find the area of the 3 rectangle shaped faces.

51. gabbyalicorn

k do we do 48 x 3?

52. gabbyalicorn

guess not

53. phi

I see a 9 x 10

54. gabbyalicorn

90

55. phi

ok remember 90 now what is the length of the red line in the figure?

56. gabbyalicorn

yes

57. phi

you are looking at a rectangle and the opposite sides of a rectangle are equal what is the length of the red line in the figure?

58. gabbyalicorn

6 but then im thinking it might be 8

59. anonymous

|dw:1433368962957:dw|

60. phi

do you see you are looking at |dw:1433368988335:dw|

61. gabbyalicorn

oh 8

62. phi

the opposite sides are equal. it is not 8

63. gabbyalicorn

9

64. anonymous

|dw:1433369052851:dw|

65. phi

yes, 9 can you find the area of the rectangle with sides 6 and 9 ?

66. gabbyalicorn

54?

67. phi

yes, so far we know 24+24 + 90 + 54 there is one more face (the back face) with the two red lines.

68. anonymous

|dw:1433369132043:dw|

69. phi

you already figured out the bottom red line is 9 can you figure out the area of that rectangle ?

70. gabbyalicorn

24+24 + 90 + 54 = 192

71. gabbyalicorn

:d B!!!!!

72. phi

yes, but we need the last face

73. anonymous

|dw:1433369253872:dw|

74. gabbyalicorn

72?

75. anonymous

76. phi

192 is not the whole answer yes 72 for the last face

77. gabbyalicorn

264

78. anonymous

and viola!

79. phi

ok, there should be a choice with 264. Pick it!

80. anonymous

@phi can you help me

81. gabbyalicorn

I will! Thank you so much for helping me!!!!!

82. anonymous

Great job!

83. gabbyalicorn

Thank you!