Three points have coordinates A(-2,-1), B(10,6) and C(a,-6). Given AB=BC find the possible values of a.If the figure ABCD is a rhoMbus, find the coordinates of D.

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- Oct 19th 2010, 08:00 AMIlsaCoordinate Geometry
Three points have coordinates A(-2,-1), B(10,6) and C(a,-6). Given AB=BC find the possible values of a.

__If the figure ABCD is a rhoMbus, find the coordinates of D.__ - Oct 19th 2010, 08:54 AMHallsofIvy