1.

If the coordinates of the vertices of an equilateral triangle with sides of length 'a' are (x1,y1),(x2,y2) and (x3,y3), then ∣∣∣∣x1y11x2y21x3y31∣∣∣∣2=3a44

Answer»

If the coordinates of the vertices of an equilateral triangle with sides of length 'a' are (x1,y1),(x2,y2) and (x3,y3), then

x1y11x2y21x3y31
2
=3a44



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