1964 IMO Problems/Problem 3

Revision as of 11:38, 16 July 2009 by Xpmath (talk | contribs) (Solution)

Problem

A circle is inscribed in a triangle $ABC$ with sides $a,b,c$. Tangents to the circle parallel to the sides of the triangle are contructed. Each of these tangents cuts off a triangle from $\triangle ABC$. In each of these triangles, a circle is inscribed. Find the sum of the areas of all four inscribed circles (in terms of $a,b,c$).

Solution

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