perplexus.info :: Geometry : Sum of Quad. Radii

Sum of Quad. Radii (Posted on 2008-04-02)

Let ABCD be a cyclic quadrilateral. Let r_A, r_B, r_C, and r_D be the inradii of triangles BCD, CDA, DAB, and ABC respectively.

Prove that r_A + r_C = r_B + r_D.

See The Solution Submitted by Bractals

Rating: 2.3333 (3 votes)

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	Subject	Author	Date
	Radii thriller!	Chesca Ciprian	2008-04-03 11:56:59

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