polygon, a closed 2D shape with straight sides, square, shape with 4 equal sides and 4 right angles, rectangle, shape with 4 sides and 4 right angles, pentagon, 5-sided polygon, hexagon, 6-sided polygon, octagon, 8-sided polygon, right triangle, 3-sided figure with one right angle, equilateral triangle, 3-sided figure with 3 equal sides, acute triangle, 3-sided figure with 3 acute angles, obtuse triangle, 3-sided figure with 1 obtuse angle, isosceles triangle, 3-sided figure with 2 equal sides (one side is different), scalene triangle, 3-sided figure with 3 unequal sides and angles.

polygons

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