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Polygon Classification

Categories of polygons based on the number of sides.

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Polygon Classification

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    Vocabulary

    Concave

    A concave polygon has at least one interior angle greater than 180 degrees. A common way to identify a concave polygon is to look for a "caved-in" side of the polygon.

    Convex

    A convex polygon contains no interior angles greater than 180 degrees.

    Decagon

    A decagon is a ten sided polygon.

    Diagonal

    A diagonal is a line segment in a polygon that connects nonconsecutive vertices

    Exterior angles

    An exterior angle is the angle formed by one side of a polygon and the extension of the adjacent side.

    Heptagon

    A heptagon is a seven sided polygon.

    Hexagon

    A hexagon is a six sided polygon.

    Interior angles

    Interior angles are the angles inside a figure.

    Nonagon

    A nonagon is a nine sided polygon.

    Octagon

    An octagon is an eight sided polygon.

    Pentagon

    A pentagon is a five sided polygon.

    Polygon

    A polygon is a simple closed figure with at least three straight sides.

    Regular Polygon

    A regular polygon is a polygon with all sides the same length and all angles the same measure.

    Vertices

    Vertices are points where line segments intersect.

    Equilateral

    A polygon is equilateral if all of its sides are the same length.

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