Online Geometry Problems

Online Geometry Problem 635: Semicircle, Diameter, Perpendicular, Inscribed Circle, Radius. Level: High School, Honors Geometry, College, Mathematics Education

The figure shows the semicircles of diameters AB (center O, radius R), and CB (center D, radius r). Line CE is perpendicular to AB and x is the radius of the inscribed circle in ECB. Prove that Formula to prove.
 

Semicircles, Perpendicular, Diameter, Inscribed Circle, Radius

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