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briana.img

  • one year ago

Find the volume of this pyramid

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  1. briana.img
    • one year ago
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  2. briana.img
    • one year ago
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    I did 8^2+b^2=13^2 and got 10.24 then did A=L*W=(8)(8)=64 sooo V=1/3(64)(10.24) and came out with 218.45

  3. anonymous
    • one year ago
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    thats what i got too

  4. briana.img
    • one year ago
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    yeha i don't know how other way to go at this

  5. anonymous
    • one year ago
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    this is confusing

  6. anonymous
    • one year ago
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    what are we doing wrong?

  7. welshfella
    • one year ago
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    you need to find the height of pyramid using pythagoras theorem on the right angled triangle

  8. briana.img
    • one year ago
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    @welshfella i thought i did that and got 1024? no?

  9. anonymous
    • one year ago
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    ya. i got 10.24

  10. welshfella
    • one year ago
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    |dw:1437083867778:dw|

  11. anonymous
    • one year ago
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    You used the entire side length as one side of the triangle. Should be half of the side length

  12. anonymous
    • one year ago
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    oh ya, you cut it in half

  13. welshfella
    • one year ago
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    h = sqrt(13^2 - 4^2)

  14. welshfella
    • one year ago
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    h = 12.37

  15. anonymous
    • one year ago
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    263.89

  16. welshfella
    • one year ago
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    volume = (1/3) * area of base * height

  17. welshfella
    • one year ago
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    yea thats right

  18. briana.img
    • one year ago
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    aaaah okay thanks everyone!!

  19. welshfella
    • one year ago
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    yw

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