just wanna ask a simple question(adsbygoogle = window.adsbygoogle || []).push({});

a quadrilateral has the vertices A ( 1,4 ), B (9,5 ) , C ( 5,-2) and D (-3,-3). show that the quadrilateral is a rhombus

what i do is find gradient AB, CD, AD and BC.

and then state which and which have the same gradient... and hence the opposite sides are parallel.

is that all i should do?

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# Homework Help: Coordinate geometry

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