Online Geometry Problems

Online Geometry Problem 812: Four Tangent Circles, Common Tangent Line, Diameter, Area, Collinear Centers. Level: High School, SAT Prep, College, Mathematics Education

The figure below shows the tangent circles of diameters AB, BC, CD, and AD so that the line EFG is the common tangent to circles AB, BC, and CD at E, F, and G, respectively. If EF = a and FG = b, prove that the shaded area Area formula to prove.  See also: Artwork of Problem 812, Typography using iPad Apps.

Four Circles, Tangent, Common Tangent Line, Area


Home | SearchGeometry | Problems | All Problems | Open Problems | Visual Index | 10 Problems | 811-820 | Circle | Semicircle | Tangent Circles | Arbelos | Areas | Email | Solution / comment | by Antonio Gutierrez