Inscribed Trapezoids

 

Two trapezoids are inscribed in the same circle.

One has sides (1, 1, 1, x)

The other has sides (x,x,x,1)

What is the diameter of the circle?

Hint: Try exploring how to construct the two inscribed trapezoids by using GSP or Geogebra.

 

Is there more than one possible construction with different size circles?

 


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Reference: Problem Section: School Science and Mathematics, Vol 111, No. 3, March 2011, Problem 5153.