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Conference rusure::math

Title:Mathematics at DEC
Moderator:RUSURE::EDP
Created:Mon Feb 03 1986
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:2083
Total number of notes:14613

1978.0. "Crux Mathematicorum 2033" by RUSURE::EDP (Always mount a scratch monkey.) Thu Jun 15 1995 10:39

    Proposed by K. R. S. Sastry, Dodballapur, India.
    
    The sides AB, BC, CD, DA of a convex quadrilateral ABCD are extended in
    that order to the points P, Q, R, S such that BP = CQ = DR = AS.  If
    PQRS is a square, prove that ABCD is also a square.
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