Quadrilateral & Circle problem
Quadrilateral ABCD is inscribed in a circle. Let AB = a, BC = b, CD = c, DA = d, AC = p and BD = q. Prove Ptolemy’s second theorem that .
This question is also taken from Bertley Math Circle .
It is easy question, just use a, b, c are sides of triangle and S is area of triangle.
If you couldn’t prove send me mail, and i will give few tips.
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Categories: Circles, Quadrilateral
circle, Ptolemy, quadrilateral, triangle
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October 4, 2011 at 14:13Triangle problem « Math World – etidhor

October 8, 2011 at 14:16Triangle Problem « Math World – etidhor

October 31, 2011 at 11:43Triangle – Area problem « Math World – etidhor