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Mathematics 8 Online
OpenStudy (anonymous):

Find the volume of the prism.

OpenStudy (anonymous):

jimthompson5910 (jim_thompson5910):

Hint: Find the volume of the base, which is this triangle here |dw:1367631262305:dw| and multiply this base area by the height

OpenStudy (anonymous):

13 * 13?

jimthompson5910 (jim_thompson5910):

this is an equilateral triangle, so use the formula \[\large A = \frac{s^2}{4}\sqrt{3}\] A = area s = side length (in this case, s = 13)

OpenStudy (anonymous):

\[A = 169 \sqrt3 / (4)\]

jimthompson5910 (jim_thompson5910):

good

jimthompson5910 (jim_thompson5910):

multiply that by the height of 24 to get \[\large V = 24*\frac{169}{4}\sqrt{3}\] \[\large V = 6*169\sqrt{3}\] \[\large V = 1014\sqrt{3}\] and that's the exact volume, you use a calculator to find the approximate volume

OpenStudy (anonymous):

1, 756.3

jimthompson5910 (jim_thompson5910):

I'm getting 1,756.29951887484 If you round that to the nearest tenth, then you get 1,756.3, so you are correct (assuming you round this way)

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