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Systems of Numeration
Some Remarkable Properties of Numbers
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90-degree triangle aepyornis altitude angular magnitude approximately axis base calculation cent centripetal acceleration circle circumference compute congruent consider coordinate corresponding cube curved cylinder decimal degrees denote diagonals diameter difference digits dihedral angle dimensions divided drawing earth earth's sphere ellipse equal equation example exponent expression factor feet Flatland follows formula fraction geometric figure googol grille height horizon distance hypotenuse inches infinity interest known letters line segment logarithms mathematicians mathematics measure method miles moon Moreover motion multiply object observer obtain parabola parallel parallelogram perpendicular plane polygon position prism problem pyramid Pythagorean quadrangle quadratic equation radius reader rectangle regular polygon represented result rhombus right angle right triangle shortest route side surface sine ratio solid figure sphere square straight line subtract Suppose tangent tion trapezoid triangle ABC velocity vertex vertices volume write zero