EntityQ1613856· pop 20· linked from 29 articlesHeronian triangleSign in to savetriangle that has side lengths and area that are all integersConnectionscoprimeEntityincircle and excircles of a triangleEntitycircumscribed circle for triangleEntityrational numberEntityPythagorean tripleEntitysimilarityEntitygeometryEntityLeonhard EulerEntitytriangleEntityareaEntityprime numberEntityintegerEntityBrahmaguptaEntityWayback MachineEntitydigital object identifierEntityirrational numberEntitypolynomialEntityperimeterEntitygreatest common divisorEntitystandard deviationEntityCategoriesArithmetic problems of plane geometryTriangles named after peopleTypes of triangles