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valmont
Posts:
3
Registered:
1/27/09


secant circles
Posted:
Jan 27, 2009 4:52 AM


Good morning. I have this problem : << Two circles C and C' intersect at points A and B. A straight line passing through B intersects the circles C and C' respectively at M and N, with B between M and N. Let I be the midpoint of the arc AM of circle C not containing B, and J the midpoint of the arc AN of circle C' not containing B. If K is the middle of MN, prove that KI is perpendicular to KJ. >> Thank you for any help.



