EntityQ3527044· pop 13· linked from 152 articlesPappus' area theoremSign in to saveRelates areas of three parallelograms attached to three sides of an arbitrary triangleConnectionsElementsEntityDiophantus of AlexandriaEntityArchimedesEntitynumberEntityPythagorasEntityEuclidEntityarithmeticEntitytriangleEntityInternational Standard Book NumberEntityThalesEntityDemocritusEntityPythagorean theoremEntityPtolemyEntityHypatiaEntityAnaxagorasEntityEratosthenesEntityparallelogramEntitygolden ratioEntityZeno of EleaEntityEuclidean geometryEntityCategoriesAncient Greek mathematicsAreaEquationsEuclidean plane geometryTheorems about triangles