MathDB

83

Part of 1990 IMO Longlists

Problems(1)

Prove that S(ABC)=AD^2 - ILL 1990 SWE1

Source:

9/19/2010
Point DD is on the hypotenuse BCBC of right-angled triangle ABCABC. The inradii of triangles ADBADB and ADCADC are equal. Prove that SABC=AD2S_{ABC} = AD^2, where SS is the area function.
geometrygeometry unsolved