Geometry Basics

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Intersecting Lines

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Lines that pass through the same point

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Perpendicular Lines

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A set of lines that intersect at right angles

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Parallel lines

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A set of lines that never intersects/are the same distance apart

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Polygon

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Any closed shape figure with 3 or more sides that are straight and an equal number of angles

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Triangle

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A three-closed polygon with 3 angles and 3 straight sides (angles total 180 degrees)

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Quadrilateral

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A four-sided closed polygon with 4 angles and 4 straight sides (angles total 360 degrees)

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Pentagon

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A five-sided closed polygon with 5 angles and 5 straight sides

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Hexagon

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A six-sided closed polygon with 6 angles and 6 straight sides

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Heptagon

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A seven-sided closed polygon with 7 angles and 7 straight sides

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Octagon

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A eight-sided closed polygon with 8 angles and 8 straight sides