# Rectangle/Related Articles

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*See also changes related to Rectangle, or pages that link to Rectangle or to this page or whose text contains "Rectangle".*

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- Integral [r]: A central concept in calculus that generalizes the idea of a sum to cover quantities which may be continuously varying.
^{[e]} - Multiplication [r]: The binary mathematical operation of scaling one number or quantity by another (multiplying).
^{[e]} - Parallelogram [r]: A four-sided plane figure with opposite sides parallel.
^{[e]} - Polygon [r]: Two-dimensional geometric closed figure bounded by a continuous set of line segments.
^{[e]} - Pythagorean theorem [r]: In a right triangle, the squared length of the side opposite the right angle is equal to the sum of the squared lengths of the two other sides.
^{[e]} - Square [r]:
*Please do not use this term in your topic list, because there is no single article for it. Please substitute a more precise term. See Square (disambiguation) for a list of available, more precise, topics. Please add a new usage if needed.* - USA education, preschool [r]:
*Add brief definition or description*