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Apply Area and Pythagorean Theorem to a prism

  1. Jul 28, 2016 #1
    1. The problem statement, all variables and given/known data

    upload_2016-7-28_15-9-43.png
    2. Relevant equations
    Formula for Area of a retangle : A = L x W
    Pythagorean theorem: A2 + b2 = c2

    3. The attempt at a solution

    So I am pretty sure I did it correct but I just want to be 100% certain I will get this right, By the way its a picture cause I found it easier to just snip it then copy paste.

    Thank you in advance for your help
    upload_2016-7-28_15-13-16.png
     
  2. jcsd
  3. Jul 28, 2016 #2

    fresh_42

    Staff: Mentor

    Looks ok, as long as we disregard the fact that an area isn't measured in cubic feet and the "entire roof" is not 240 sqft. Calculation A, text D . :biggrin:
     
  4. Jul 28, 2016 #3

    haruspex

    User Avatar
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    2016 Award

    He will not need approximately 15; he will need to buy exactly 15. It would not be possible to buy 0.54 of a bundle.
     
  5. Jul 29, 2016 #4
    @har your right just noticed that and thx you

    @fresh thx you to :)
     
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