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gabbyalicorn

  • one year ago

What is the surface area of the prism? A. 82 yd2 B. 90 yd2 C. 96 yd2 D. 108 yd2

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  1. gabbyalicorn
    • one year ago
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    https://www.dropbox.com/s/1qmyhpcjs11vm6p/Screenshot%202015-06-06%2014.29.21.png?dl=0

  2. Michele_Laino
    • one year ago
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    here we have two rectangle triangles like this: |dw:1433626232605:dw| the area of each of such triangle is: A=(3*4)/2=...

  3. gabbyalicorn
    • one year ago
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    i got 6 then since u said there was two then 6 x 6 ? or 6 plus 6

  4. Michele_Laino
    • one year ago
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    we have 2 of such triangles, so the corresponding area is:6+6=...

  5. gabbyalicorn
    • one year ago
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    9

  6. Michele_Laino
    • one year ago
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    6+6=12

  7. Michele_Laino
    • one year ago
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    am I right?

  8. gabbyalicorn
    • one year ago
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    oh crap im sorry your right lol i dont know what i was thinking XP

  9. Michele_Laino
    • one year ago
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    now, we have one rectangle like this: |dw:1433626488374:dw| which is the base of your prism. The area of that rectangle is: 3*7=...

  10. gabbyalicorn
    • one year ago
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    21

  11. Michele_Laino
    • one year ago
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    ok!

  12. Michele_Laino
    • one year ago
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    now, we have another ectangle like this: |dw:1433626580385:dw| and its area is: 5*7=...

  13. gabbyalicorn
    • one year ago
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    35

  14. Michele_Laino
    • one year ago
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    ok!

  15. Michele_Laino
    • one year ago
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    finally, we have this rectangle: |dw:1433626641337:dw| and its area is: 4*7=...

  16. gabbyalicorn
    • one year ago
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    28

  17. Michele_Laino
    • one year ago
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    correct! So the total area is: 6+6+21+35+28=...

  18. gabbyalicorn
    • one year ago
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    96

  19. Michele_Laino
    • one year ago
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    that's right! area = 96 yd^2

  20. gabbyalicorn
    • one year ago
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    :D yay! TY!

  21. Michele_Laino
    • one year ago
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    :)

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