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A LITTLE SOMETHING WORTH KNOWING

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Euclidean quadrilateral · sum of interior angles

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Lengths use linear units, areas use square units, and volumes use cubic units. Source: Geometry ↗

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More from Geometry Essentials

A few more worth knowing.

  1. 03Area of a rectangleRECALL
    length × width

    Measured in square units

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  2. 04Area of a triangleRECALL
    base × height ÷ 2

    Half a matching parallelogram

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  3. 05Circumference of a circleRECALL
    2πr

    Also π times diameter

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