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1990 AHSME Problems/Problem 21: Revision history

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4 February 2016

29 September 2014

  • curprev 14:5614:56, 29 September 2014 Timneh talk contribs 661 bytes +661 Created page with "== Problem == Consider a pyramid <math>P-ABCD</math> whose base <math>ABCD</math> is square and whose vertex <math>P</math> is equidistant from <math>A,B,C</math> and <math>D</ma..."
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