Line, can be extended unlimitedly in two directions., Ray, can be extended unlimitedly in one direction., Line Segment, is limited in two directions., Measure of right angle, is 90 degrees, Measure of acute angle, is between 0 and 90 degrees, Measure of obtuse angle, is between 90 and 180 degrees, Measure of straight angle, is 180 degrees, Perpendicular, is a line, segment or ray drawn perpendicularly from a point to a line., Polygon, is a closed geometric shape formed by adding at least three line segments end to end to form an angle., Edge, Line segments forming a polygon, Corner, Points where edges meet, Interior angle, angles formed between the sides and inside the polygon, Diagonal, Line segment joining two non-adjacent vertices in polygons.

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