Skip to content

Sections

Maps Timeline Graph Cosmos Life Culture Innovation People Climate Trends Art

Browse Dictionary Search

© 2026 Vinony · Knowledge from Wikipedia, Wikidata, and 27 public APIs.

Robbins pentagon · Vinony

🌐English

English Español Français Nederlands Русский 中文日本語

EntityQ2852551· pop 5· linked from 8 articles

Robbins pentagon

cyclic pentagon whose side lengths and area are all rational numbers

Connections

Heronian triangle

Categories

Arithmetic problems of plane geometry Circles Types of polygons

Sources

wikipedia.externallinksexternallink

rational number

Entity

digital object identifier

Hero of Alexandria

Heron's formula

list of unsolved problems in mathematics

Mathematical Reviews

concyclic points

American Mathematical Monthly

Forum Geometricorum

Journal of Number Theory

David P. Robbins

Sign in to save

What links here8 pages

concyclic points

integer triangle

cyclic quadrilateral

Heronian triangle

David P. Robbins

Similar entities

Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).

Category:The Pentagon

Entitydist 0.50

gyroelongated pentagonal pyramid

Entitydist 0.52

David P. Robbins Prize

Entitydist 0.53

David P. Robbins

Entitydist 0.53

Herbert Robbins

Entitydist 0.53

Entitydist 0.53

Babylonian mathematics

Entitydist 0.54

digital geometry

Entitydist 0.54

Category:Theorems about quadrilaterals and circles

Entitydist 0.54

Entitydist 0.55

Entitydist 0.55

van Aubel's theorem

Entitydist 0.56