Homework Help: Geometry HELP

Posted by Ariel on Thursday, June 10, 2010 at 8:58am.

Using coordinate geometry to prove that the diagonals of a square are perpendicular to each other.
Given: Vertices are at A(0,0), B(a,0), C(a,a) and D(0,a) Slope of AC=1; Slope of BD=-1

Type your proof.
(someone plz help cuz i don't understand)

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