briana.img
  • briana.img
Find the volume of this pyramid
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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briana.img
  • briana.img
briana.img
  • briana.img
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
anonymous
  • anonymous
thats what i got too

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briana.img
  • briana.img
yeha i don't know how other way to go at this
anonymous
  • anonymous
this is confusing
anonymous
  • anonymous
what are we doing wrong?
welshfella
  • welshfella
you need to find the height of pyramid using pythagoras theorem on the right angled triangle
briana.img
  • briana.img
@welshfella i thought i did that and got 1024? no?
anonymous
  • anonymous
ya. i got 10.24
welshfella
  • welshfella
|dw:1437083867778:dw|
anonymous
  • anonymous
You used the entire side length as one side of the triangle. Should be half of the side length
anonymous
  • anonymous
oh ya, you cut it in half
welshfella
  • welshfella
h = sqrt(13^2 - 4^2)
welshfella
  • welshfella
h = 12.37
anonymous
  • anonymous
263.89
welshfella
  • welshfella
volume = (1/3) * area of base * height
welshfella
  • welshfella
yea thats right
briana.img
  • briana.img
aaaah okay thanks everyone!!
welshfella
  • welshfella
yw

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