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AP Calculus AB/BC
A four-sided shape with opposite sides that are equal in length and all angles measuring 90 degrees, used to enclose an area or protect something.
Rectangle: A quadrilateral with four right angles and opposite sides having equal lengths.
Side Lengths: The measurement from one corner (vertex) of a shape to another along its edges.
Diagonal Lengths: The measurement from one corner (vertex) to the opposite corner of a shape, passing through the interior.