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anonymous

  • one year ago

Find the surface area of each of the following right prisms. Round to the nearest whole number. (There's a picture when you click on the question)

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  1. anonymous
    • one year ago
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  2. ganeshie8
    • one year ago
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    You need to find the area of each of its faces and add them up

  3. anonymous
    • one year ago
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    Thanks

  4. ganeshie8
    • one year ago
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    How many rectangles and triangles do you see here ?|dw:1435555721742:dw|

  5. anonymous
    • one year ago
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    5 rectangles and 2 triangles

  6. ganeshie8
    • one year ago
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    are you really sure about 5 rectangles i do see 2 triangles

  7. anonymous
    • one year ago
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    I'm sorry i mean't 3 not five

  8. ganeshie8
    • one year ago
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    great! find the area of each of them, remember how to find area of rectangle ?

  9. anonymous
    • one year ago
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    No, what formula should I use to find the rectangle?

  10. ganeshie8
    • one year ago
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    simply multiply the length and width : Area of rectangle = length x width

  11. anonymous
    • one year ago
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    aww yes sorry. I'm just really tired right now.

  12. ganeshie8
    • one year ago
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    |dw:1435556006598:dw|

  13. ganeshie8
    • one year ago
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    similarly see if you can find the area of other two rectangles

  14. anonymous
    • one year ago
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    Wouldn't it still be 5x12=60?

  15. ganeshie8
    • one year ago
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    yes, what about the bottom rectangle ?

  16. anonymous
    • one year ago
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    6x12=72

  17. ganeshie8
    • one year ago
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    Excellent! so area of the 3 rectangular faces = 60+60+72 = ?

  18. anonymous
    • one year ago
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    192

  19. ganeshie8
    • one year ago
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    good, keep it aside. lets find the area of two triangles

  20. ganeshie8
    • one year ago
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    |dw:1435556339793:dw|

  21. ganeshie8
    • one year ago
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    the back triangle also looks exactly same, so the area of two triangles would be simply : 12 + 12 = 24

  22. ganeshie8
    • one year ago
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    Add that to the area of rectangles and you're done!

  23. anonymous
    • one year ago
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    192+24=216

  24. ganeshie8
    • one year ago
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    Perfect! im pretty sure you can work the next problem on ur own

  25. anonymous
    • one year ago
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    Yep thanks for all the help I needed it!!

  26. ganeshie8
    • one year ago
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    just be careful, the shape looks a bit complicated... but you know what to do, simply find the area of each face and add up :)

  27. anonymous
    • one year ago
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    Ok thank you soo much :) Have a nice night

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