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Barron's geometry the easy way
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Sir Cumference and the Great Knight of Angleland : a math adventure
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Sir Cumference and the Isle of Immeter : a math adventure
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Sir Cumference and the first round table : a math adventure
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Shapes, shapes, shapes
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Round
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Pythagoras and the ratios : a math adventure
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Must know high school trigonometry
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Squares, rectangles, and other quadrilaterals
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The complete idiot's guide to trigonometry
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Trigonometry success
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Trigonometry demystified
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Cool flexagon art : creative activities that make math & science fun for kids!
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Shape patterns
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Schaum's outline of theory and problems of geometry : includes plane, analytic, transformational, and solid geometries
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Bob Miller's geometry for the clueless : geometry
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A star in my orange : looking for nature's shapes
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Cubes, cones, cylinders & spheres
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Geometry
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I know shapes
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The Wing Wing brothers geometry palooza!
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Geometry demystified
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Euclid's window :the story of geometry from parallel lines to hyperspace
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So many circles, so many squares
