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Intersecting Circles and a Right Angle
Let A, B, C, and D be points on a circle with center O. Let the lines AB and CD meet at M. Let the circumcircles of AOC and DOB meet at K apart from O. Then
is
.
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Contributed by:
Jay Warendorff
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See a problem from
Russia 1995.
RELATED LINKS
Circumcircle
(
Wolfram
MathWorld
)
Perpendicular
(
Wolfram
MathWorld
)
PERMANENT CITATION
"
Intersecting Circles and a Right Angle
" from
the Wolfram Demonstrations Project
http://demonstrations.wolfram.com/IntersectingCirclesAndARightAngle/
Contributed by:
Jay Warendorff
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