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Mathematics 9 Online
OpenStudy (mythorius):

http://prntscr.com/asm76t Help please, will medal and fan!

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

ganeshie8 (ganeshie8):

how 8 ?

ganeshie8 (ganeshie8):

you need to use this formula http://www.math.com/images/tables/garea1.gif

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

OpenStudy (mythorius):

@soprano.h.d0816

OpenStudy (mythorius):

OpenStudy (soprano.h.d0816):

https://www.google.com/?gws_rd=ssl#q=find+the+lateral+area+of+a+pyramid Not completely for sure, but I plugged in the numbers.

OpenStudy (mythorius):

Its just a regular pyramid, not a right triangle, love

ganeshie8 (ganeshie8):

hey sry was away, still working on this ?

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 \(\sqrt{3}/4 *4^2 = 4\sqrt{3}\)

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?

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

ganeshie8 (ganeshie8):

yw

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