square - four right angles, four equal length sides, opposite sides are parallel, rectangle - four right angles, opposite sides the same length and are parallel, parallelogram - four angles, opposite sides the same length and are parallel, rhombus - four angles, four equal length sides, opposite sides are parallel, trapezoid - four sides, four angles, at least one pair of parallel sides, triangle - three sides, three angles, hexagon - six sides, six angles, pentagon - five sides, five angles, octogon - eight sides, eight angles, cirlce - a round plane figure whose boundary consists of points equally distant from the center., polygon - a closed plane figure, made up of three or more line segments,

Plane Figures

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