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Triangle ABC is isosceles. BD is tangent to both circles. The incircle of triangle ABD, circle Q, and the excircle of triangle BXC, circle P, have the same radius. What is it?
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The solution is HERE
Dave Lindell, PS, retired after 36 1/2 years with the City of Los Angeles. He keeps surveying part time to stay busy and keep out of trouble.
A 155Kb PDF of this article as it appeared in the magazine—complete with images—is available by clicking HERE