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Piling-Up-The-Rectangles_by-Jess_from-the-Proof-of-the-Pythagoean-theorem_by-Joseph-Needham
He who understands the earth is a wise man -and he who understands the heavens is a sage. Knowledge is derived from the straight line. The straight line is derived from right angle. --- Joseph Needham from his "Science & Civilization in China"
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