LibraryShapes & SpaceOne card

A LITTLE SOMETHING WORTH KNOWING

A small discovery. Yours to pass on.

Math & LogicOne small ahaShape

This shape has five sides and five angles, and also names the US Department of Defense's headquarters building.

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Your new ahaPentagon

Pentagon: Polygon with five sides and five angles. Source: Pentagon

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More from Shapes & Space

A few more worth knowing.

  1. 06This six-sided polygon forms the familiar outline of a honeycomb cell.RECALL
    Hexagon

    The six-sided hexagon appears naturally in the honeycomb structures built by bees.

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  2. 07This general term names a closed plane figure bounded by straight line segments.RECALL
    Polygon

    A polygon is any closed shape of straight segments, named for however many sides it has.

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  3. 08This rectangle's longer-to-shorter side ratio is (1 + √5) / 2.IDENTIFY
    The Golden Rectangle

    A golden rectangle's sides follow the golden ratio, a proportion often described as especially pleasing.

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