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a new trick with an old principle
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accuracy algebra algebraic curve Alice Ana Lytic angle application arith axioms Cajori Calculus century circle complex numbers computation cube curve decimal places decimal point diagonals digits distance divide division divisor draw elementary algebra equal equation Escott Euclid's Euclid's postulate exponents expressed factors fallacy fallacy of accident figure fractions geometry given number ical illustration imaginary invented known limit logarithms magic squares mathe matics means measures method metic million move multiplicand multiplier Napier's rods negative numbers nine-point circle Non-Euclidean Geometry notation obtained odd order parallel postulates partial products Phool plane plane geometry points of odd postulate primary unit problem proof pupils quotient ratio Recreations remainder repetend result root separatrix shown solution Stevin's straight line subtract symbols tables taking theorem theory of numbers tion triangle trigonometric unicursal variable vertex wand William Rowan Hamilton Wilson's theorem write zero