Mathematics
9 Online
OpenStudy (mythorius):
http://prntscr.com/asm76t Help please, will medal and fan!
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OpenStudy (mythorius):
@Qwertty123 @Directrix
OpenStudy (qwertty123):
Hmm..I haven't learn that yet.. but maybe @ganeshie8 can help you :)
ganeshie8 (ganeshie8):
whats the area of an equilateral triangle with side 4 ?
OpenStudy (mythorius):
8
OpenStudy (mythorius):
@ganeshie8
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ganeshie8 (ganeshie8):
how 8 ?
OpenStudy (mythorius):
@jabez177
jabez177 (jabez177):
Tag me in about 2 more years or so. xD For now, @Ganeshie8 is the one you tag. xD
OpenStudy (mythorius):
@ganeshie8 27.71
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OpenStudy (mythorius):
@soprano.h.d0816
OpenStudy (mythorius):
OpenStudy (mythorius):
Its just a regular pyramid, not a right triangle, love
ganeshie8 (ganeshie8):
hey sry was away, still working on this ?
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OpenStudy (mythorius):
yeah. I got 27.71 for the area
ganeshie8 (ganeshie8):
doesn't look correct
OpenStudy (mythorius):
Then 35.78
ganeshie8 (ganeshie8):
the lateral sides are 3 equilateral triangles
ganeshie8 (ganeshie8):
area of each equilateral triangle is \(\sqrt{3}/4 *4^2 = 4\sqrt{3}\)
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ganeshie8 (ganeshie8):
multiply that by 3 to get the lateral area of the given pyramid
ganeshie8 (ganeshie8):
\(3*4\sqrt{3}=?\)
OpenStudy (mythorius):
3*4 sqrt3= 20.78
ganeshie8 (ganeshie8):
looks good!
OpenStudy (mythorius):
So now what?
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ganeshie8 (ganeshie8):
we're done
ganeshie8 (ganeshie8):
20.78 is the lateral area
OpenStudy (mythorius):
but it has to be a number with a square root
ganeshie8 (ganeshie8):
\[12\sqrt{3}\]
OpenStudy (mythorius):
thank you
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ganeshie8 (ganeshie8):
yw