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Prominent Russian mathematician's concise
"I believe Ray Smullyan to be the Lewis Carroll of our times
among them the well-known "Piece Héroique"
decorative knots
Challenging Problems in Geometry Prominent Russian mathematician's conciseDesigned for high school students and teachers with an interest in mathematical problem solving, this volume offers a wealth of nonroutine problems in geometry that stimulate students to explore unfamiliar or little known aspects of mathematics. Included are nearly 200 problems dealing with congruence and parallelism, the Pythagorean theorem, circles, area relationships, Ptolemy and the cyclic quadrilateral, collinearity and concurrency, and many
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