can anyone help??

got this question,,

The points ABC have co ordinates (2, 1) (b,3) and (5,5) where b>3

and angle ABC=90degrees ??

I know the answer just have no idea how to work it out.

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- November 25th 2008, 12:30 PMadeshSBco ordinate geometry
can anyone help??

got this question,,

The points ABC have co ordinates (2, 1) (b,3) and (5,5) where b>3

and angle ABC=90degrees ??

I know the answer just have no idea how to work it out. - November 25th 2008, 12:39 PMskeeter
(slope of AB)(slope of BC) = -1

- November 25th 2008, 12:43 PMPlato
In a right triangle .

So - November 25th 2008, 01:02 PMadeshSB