closed shape, a shape that begins and ends at the same point, open shape, a shape that does NOT begin and end at the same point, endpoint, a point at one end of a segment or the starting point of a ray, line, a straight path extending in both directions with no endpoints, line segment, a part of a line that has two endpoints, point, an exact position or location, ray, a part of a line, with one endpoint, that is straight and continues in one direction, angle, a shape formed by two rays that share the same endpoint, vertex, a point where two or more straight lines meet, polygon, a closed plane shape with straight sides, decagon, a polygon with ten sides, hexagon, a polygon with six sides, octagon, a polygon with eight sides, pentagon, a polygon with five sides, quadrilateral, a polygon with four sides, triangle, a polygon with three sides, parallelogram, a quadrilateral with opposite sides parallel, rectangle, a quadrilateral with four right angles, rhombus, a parallelogram with four equal sides, square, a parallelogram with four equal sides and four right angles, trapezoid, a quadrilateral with only one pair of parallel sides, right angle, an angle that measures 90 degrees and makes a corner, intersecting lines, lines that cross at one point, parallel lines, lines that will never intersect, perpendicular lines, lines that intersect to form right angles

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