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shape definition and basic terms

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
Square   A four sided figure with equal sides and angles  
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Triangle   A three sided polygon that can be classified six different ways!  
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Pentagon   A five sided polygon  
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Hexagon   A six sided polygon  
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Heptagon   A seven sided polygon  
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Octagon   An eight sided polygon  
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Decagon   A ten sided polygon  
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Regular Polygon   A polygon that has all equal sides and angles  
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Irregular Polygon   A polygon that does NOT have equal sides and angles  
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Polygon   A closed figure with straight sides  
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Parallelogram   A four sided figure that 2 pair of equal opposite sides that are also parallel and opposite angles that are equal ( 2 obtuse and 2 acute)  
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Trapezoid   A quadrilateral (4 sided figure) with only one set of parallel sides  
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Quadrilateral   A four sided polygon (may include squares, rectangles, parallelograms, trapezoids, and a rhombus)  
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