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Find the coordinates of the vertices of an equilateral triangle of side 2a as shown in Figure.

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Area=`(sqrt(3))/4 a^2=(sqrt3)/4(2a)^2=(sqrt3)/4X4a ^2=sqrt(3a^2)`
Area=`1/2 XbXh`
sqrt3 a^2=(2aXh)/2`
`h=sqrt3 a`
...
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