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randomecorner

  • one year ago

What is the surface area of the rectangular prism?

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  1. randomecorner
    • one year ago
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    need help on this one and 2 more

  2. anonymous
    • one year ago
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    Hi. The surface area of a right rectangular prism is: A = 2(wl + hl + hw), where A is area, w is width, h is height, and l is length.

  3. anonymous
    • one year ago
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    |dw:1433909333961:dw|

  4. randomecorner
    • one year ago
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    im cornfusssed

  5. randomecorner
    • one year ago
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    im not ''talented'' in math

  6. anonymous
    • one year ago
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    It's okay! You're good enough. Practice makes perfect.

  7. anonymous
    • one year ago
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    Let's start simply.

  8. anonymous
    • one year ago
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    |dw:1433909454486:dw|

  9. anonymous
    • one year ago
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    Can you tell me what the area is of that square?

  10. randomecorner
    • one year ago
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    area?

  11. randomecorner
    • one year ago
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    ;-;

  12. randomecorner
    • one year ago
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    were u go? @IParke

  13. randomecorner
    • one year ago
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    |dw:1433909583762:dw|

  14. randomecorner
    • one year ago
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    |dw:1433909621965:dw|

  15. anonymous
    • one year ago
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    |dw:1433909631013:dw|

  16. randomecorner
    • one year ago
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    oh i thought i got dicthed again lol im judt that bad at math

  17. anonymous
    • one year ago
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    How many circles did I draw? Quickly!

  18. randomecorner
    • one year ago
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    9

  19. anonymous
    • one year ago
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    And how did you know that?

  20. randomecorner
    • one year ago
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    3 times 3

  21. randomecorner
    • one year ago
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    or there are 3 rows of three circles

  22. anonymous
    • one year ago
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    Excellent. Area works the same exact way.

  23. anonymous
    • one year ago
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    Now imagine instead of 'circles' I drew 'inches'. Well, to get the total number of inches, it's the same way you calculated the number of circles I drew.

  24. anonymous
    • one year ago
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    3 inches x 3 inches = 9 inches

  25. anonymous
    • one year ago
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    Are you following?

  26. randomecorner
    • one year ago
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    oh so in the problum you times the sides?

  27. anonymous
    • one year ago
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    Exactly. So in that square I drew, can you use the letters to tell me what my area should be?

  28. anonymous
    • one year ago
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    |dw:1433909867708:dw|

  29. randomecorner
    • one year ago
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    4 times h?

  30. anonymous
    • one year ago
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    Remember, you found 3x3 because 3 columns and 3 rows. Here I have w columns and h rows. w*h

  31. anonymous
    • one year ago
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    Is this clear?

  32. randomecorner
    • one year ago
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    kinda [can we use numbers plz]

  33. anonymous
    • one year ago
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    Yes, of course.

  34. anonymous
    • one year ago
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    |dw:1433909978681:dw|

  35. randomecorner
    • one year ago
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    lol thx letters get me confused

  36. anonymous
    • one year ago
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    No problem! It's not important here.

  37. randomecorner
    • one year ago
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    so 4times 6

  38. anonymous
    • one year ago
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    Let's use the values I drew on the square friend ;)

  39. randomecorner
    • one year ago
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    wait no you times the 3

  40. anonymous
    • one year ago
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    Let me show you why area is stuff like "inches squared" or "centimeters squared"

  41. anonymous
    • one year ago
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    I think that will help you a lot.

  42. randomecorner
    • one year ago
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    probably lol

  43. anonymous
    • one year ago
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    |dw:1433910092578:dw|

  44. anonymous
    • one year ago
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    Quick! How many boxes?

  45. randomecorner
    • one year ago
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    24page froze srry

  46. anonymous
    • one year ago
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    No problem. And you solved that how?

  47. randomecorner
    • one year ago
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    4 times 6

  48. anonymous
    • one year ago
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    Exactly :D

  49. randomecorner
    • one year ago
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    isnt it lentgh times with

  50. anonymous
    • one year ago
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    You are exactly correct.

  51. randomecorner
    • one year ago
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    heck to da chaaa

  52. anonymous
    • one year ago
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    |dw:1433910316379:dw|

  53. anonymous
    • one year ago
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    Now pay close attention to my magic.

  54. anonymous
    • one year ago
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    I just changed "boxes" to "inches." Are you following?

  55. randomecorner
    • one year ago
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    ya

  56. anonymous
    • one year ago
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    This answer here is 24 inches squared because, I have 24 squares that are inches.

  57. randomecorner
    • one year ago
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    [after this im goint to draw u a picture]

  58. randomecorner
    • one year ago
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    brb cat needs water

  59. anonymous
    • one year ago
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    |dw:1433910438339:dw|

  60. anonymous
    • one year ago
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    Sure, no problem. Look at the black box I just drew. The box is 1 inch by 1 inch, making it a square. There are 24 of these squares in my 6 inch by 4 inch area.

  61. anonymous
    • one year ago
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    This is why it is called 24 inches "squared." I have 24 squares. Are you following?

  62. randomecorner
    • one year ago
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    yes

  63. randomecorner
    • one year ago
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    |dw:1433910623508:dw|

  64. randomecorner
    • one year ago
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    @IParke

  65. randomecorner
    • one year ago
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    What is the surface area of the rectangular prism?

  66. anonymous
    • one year ago
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    Let's get to that.

  67. randomecorner
    • one year ago
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    i know i just put it back over here so wedont have to scroll up lol

  68. anonymous
    • one year ago
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    |dw:1433910836272:dw|

  69. anonymous
    • one year ago
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    This is your rectangular prism, do you agree?

  70. randomecorner
    • one year ago
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    ya but its more wider

  71. anonymous
    • one year ago
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    Mine isn't drawn to scale, but it will make it easier for me to draw on :)

  72. randomecorner
    • one year ago
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    so it throws me off

  73. randomecorner
    • one year ago
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    ok i understand

  74. anonymous
    • one year ago
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    So, you know what surface area is? It's the area on the outside of this 3d shape.

  75. randomecorner
    • one year ago
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    ok so what we do first is leinght timess width?

  76. anonymous
    • one year ago
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    |dw:1433911000222:dw|

  77. anonymous
    • one year ago
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    Sure. Let's call 12 inches the length and 10 inches the width.

  78. anonymous
    • one year ago
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    Do you see the area of this length times width? Can you calculate it?

  79. randomecorner
    • one year ago
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    ok sowe get 120

  80. anonymous
    • one year ago
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    Excellent, we get 120 inches sq.

  81. randomecorner
    • one year ago
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    so we

  82. randomecorner
    • one year ago
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    so next we divide by 3?

  83. anonymous
    • one year ago
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    |dw:1433911094878:dw|

  84. anonymous
    • one year ago
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    No, we do not divide by 3.

  85. randomecorner
    • one year ago
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    aww

  86. anonymous
    • one year ago
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    Do you see the area I shaded? What is the area of the shaded region?

  87. randomecorner
    • one year ago
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    i forgot the word [ive been doing nothing but math since 1;00 am

  88. anonymous
    • one year ago
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    |dw:1433911203882:dw|

  89. anonymous
    • one year ago
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    The top and bottom of this prism have the same length and width.

  90. anonymous
    • one year ago
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    So they both have the same area. Can you see this?

  91. anonymous
    • one year ago
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    We have 2 areas that are 12 times 10 = 120 inches squared.

  92. randomecorner
    • one year ago
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    ya

  93. randomecorner
    • one year ago
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    so we dived them 2?

  94. anonymous
    • one year ago
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    We multiple them.

  95. randomecorner
    • one year ago
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    why multiply?

  96. anonymous
    • one year ago
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    We have 2 areas with 120 inches squared. That equals 120 inches squared + 120 inches squared.

  97. randomecorner
    • one year ago
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    so 240

  98. anonymous
    • one year ago
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    Remember that the top and bottom both have the same area. There's 2 of these areas on this prism :)

  99. anonymous
    • one year ago
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    |dw:1433911367489:dw|

  100. randomecorner
    • one year ago
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    so after we get that answer we add them?

  101. anonymous
    • one year ago
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    Is this clear?

  102. randomecorner
    • one year ago
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    yes it is get ready for take off

  103. anonymous
    • one year ago
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    Great.

  104. anonymous
    • one year ago
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    |dw:1433911437373:dw|