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Circle, Circle, Triangle, Circle! (Posted on 2004-09-08) Difficulty: 4 of 5
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)

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re: Tan | Comment 9 of 10 |
(In reply to Tan by Nithin)

Yes but you must show that the line from C tangent to the red circle passes through circle X.  You haven't proved anything meaningful in your post.


  Posted by David Shin on 2004-09-25 03:43:52
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