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Quadrilaterals with Integer Sides

by Jennifer Heppner (Grinnell College) and Charles Jepsen (Grinnell College) and Daniel Willms (Grinnell College)

This article originally appeared in:
Mathematics Magazine
October, 2000

Subject classification(s): Discrete Mathematics | Combinatorics
Applicable Course(s): 3.7 Discrete Math | 4.4 Combinatorics

The authors generalize a standard counting problem for triangles to the cases of cyclic quadrilaterals and trapezoids.

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