Ptolemy's theorem

Summary

Ptolemy's theorem is a theorem^[1]. It ranks in the top 9% of theorem entities by monthly Wikipedia readership (262 views/month).^[2]

Key Facts

• Ptolemy's theorem's instance of is recorded as theorem^[3].
• Ptolemy is named after Ptolemy's theorem^[4].
• Ptolemy's theorem's subclass of is recorded as Casey’s theorem^[5].
• Ptolemy's theorem's part of is recorded as list of theorems^[6].
• Ptolemy's theorem's Commons category is recorded as Ptolemy's theorem^[7].
• Ptolemy's theorem's publication date is recorded as +0100-00-00T00:00:00Z^[8].
• Ptolemy's theorem's Freebase ID is recorded as /m/057r6r^[9].
• Ptolemy's theorem's statement describes is recorded as cyclic quadrilateral^[10].
• Ptolemy's theorem's studied by is recorded as Euclidean geometry^[11].
• Ptolemy's theorem's MathWorld ID is recorded as PtolemyInequality^[12].
• Ptolemy's theorem's maintained by WikiProject is recorded as WikiProject Mathematics^[13].
• Ptolemy's theorem's copyright status is recorded as public domain^[14].
• Ptolemy's theorem's copyright status is recorded as public domain^[15].
• Ptolemy's theorem's Microsoft Academic ID is recorded as 82738788^[16].
• Ptolemy's theorem's PlanetMath ID is recorded as PtolemysTheorem^[17].
• Ptolemy's theorem's Great Russian Encyclopedia portal ID is recorded as teorema-ptolemeia-1feafe^[18].
• Ptolemy's theorem's Metamath statement ID is recorded as ptolemy^[19].

Why It Matters

Ptolemy's theorem ranks in the top 9% of theorem entities by monthly Wikipedia readership (262 views/month).^[2] It has Wikipedia articles in 25 language editions, a strong signal of global cultural recognition.^[20] It is known by 14 alternative names across languages and contexts.^[21]