Show that P(1,7), Q(7,5), R(6,2), S(0,4) are the vertices of a rectangle. Calculate the lengths of the diagonals, and find their point of intersection.

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AS Core 1 Edexcel Maths Pearson

Chapter 6: Coordinate geometry and the straight line

Exercise 6B

Posted Mon 26th November, 2012 @ 20:35 by Mariya

1 Answer

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use the equation - sqrt of (x2-x1)^2 + (y2-y1)^2 to find out the lenghts of each side. then use pythagoras to find out the diagonals. The points should be perpendicular to each other and have negative reciprocal gradients.

Answered Mon 31st December, 2012 @ 13:25 by Yamuna