Amicable Lattice Rhombuses Are Equable

A polygon is equable if its area is equal to its perimeter. A pair of polygons is an amicable pair if the area of the first is equal to the perimeter of the second, and vice versa. A polygon is a lattice polygon if its vertices lie on the integer lattice. We show that amicable lattice rhombuses are actually equable.

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Publication Details

Journal
Geometry
Published
2026-09-15
DOI
https://doi.org/10.3390/geometry3030018
Primary Topic
Mathematics and Applications
Type
article
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article

Amicable Lattice Rhombuses Are Equable

W. Zeng, Iwan Praton, Bohdan Biekietov
Geometry
Mathematics and Applications
article

Amicable Lattice Rhombuses Are Equable

W. Zeng, Iwan Praton, Bohdan Biekietov
article en

Abstract

A polygon is equable if its area is equal to its perimeter. A pair of polygons is an amicable pair if the area of the first is equal to the perimeter of the second, and vice versa. A polygon is a lattice polygon if its vertices lie on the integer lattice. We show that amicable lattice rhombuses are actually equable.

GeometryVol. 3(3)
Franklin & Marshall College (US)
Openalex Percentile: Top 5%
Mathematics and Applications
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Amicable Lattice Rhombuses Are Equable — W. Zeng, Iwan Praton, et al. · Geometry (2026) | TGRS Research Map | TGRS