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A New Proof of the Double Butterfly Theorem

Using Haruki's lemma, the author provides an easy proof of the Double Butterfly Theorem in plane geometry regarding a circle and its chords.
Old Node ID: 
3631
MSC Codes: 
97G40
Author(s): 
Larry Hoehn (Austin Peay State University)
Publication Date: 
Monday, February 21, 2011
Original Publication Source: 
Mathematics Magazine
Original Publication Date: 
October, 1990
Subject(s): 
Circles
Plane Geometry
Geometry and Topology
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Publish Page: 
Furnished by JSTOR: 
File Content: 
Rating Count: 
18.00
Rating Sum: 
46.00
Rating Average: 
2.56
Applicable Course(s): 
4.10 Math for High School Teachers
4.9 Geometry
Modify Date: 
Monday, February 21, 2011
Average: 2.6 (18 votes)

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