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 Circle, Circle, Triangle, Circle! (Posted on 2004-09-08)
Consider a circle O with a diameter AB, shown here in green. Draw a second circle (red) with diameter AC, such that C is on AB. Draw an isosceles triangle with base CB and third vertex D on circle O. Draw a third circle (X), tangent to the first three figures. Prove that the line from C to the center of circle X is perpendicular to AB.

 No Solution Yet Submitted by SilverKnight Rating: 3.5556 (9 votes)

 Subject Author Date Can't be proven? Caz 2005-11-06 22:17:27 re: Tan David Shin 2004-09-25 03:43:52 Tan Nithin 2004-09-24 17:18:08 Error in Solution David Shin 2004-09-11 15:55:51 Geometry Theory Celie 2004-09-11 14:59:47 Solution Bractals 2004-09-10 16:18:51 Solution David Shin 2004-09-09 16:09:12 re(2): First Step Jim 2004-09-09 12:16:41 re: First Step Jim 2004-09-09 11:44:50 First Step Dan Blume 2004-09-09 02:39:30

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