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Amicable Heronian Parallelograms
Iwan Praton, Weiran Zeng
A convex polygon is Heronian if its side lengths and its area are integers. Two polygons are amicable if the area of one is equal to the perimeter of the other, and vice versa. We…
math.MG2025
Amicable Triangle and Rectangles on the Integer Lattice
Iwan Praton, Weiran Zeng
Two polygons are amicable if the perimeter of one is equal to the area of the other and vice versa. A polygon is a lattice polygon if its vertices are on the integer lattice …