- #1
parshyaa
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Homework Statement
Q. Prove that If (x1,y1) and (x2,y2) are the coordinates of the two vertices of an Equilateral Triangle then the coordinates of the 3rd vertex (X,Y) are
$$X=\frac{x1+x2\pm\ √3(y1-y2)}{2},$$
$$Y=\frac{y1+y2\pm\ √3(x1-x2)}{2},$$
The Attempt at a Solution
I used distance formula,cos rule,sine rule, equated determinant formula of area of triangle to (√3/4)((side)^2)
Please give me a really helpful hint or not so complex proof.
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