Saturday
March 28, 2015

Homework Help: Math/Geometry

Posted by abcd on Wednesday, March 13, 2013 at 6:12am.

Two circles of radius r1 and r2 are extenally tangential to each other and are also externally tangential to a staight line l. Another circle of some unknown radius is externally tangential to both the circles and to the straight line l. Find the adius of that circle.

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