EntityQ155939· pop 19· linked from 244 articlestriangular bipyramidSign in to savebipyramid over a triangleConnectionstetrahedronEntitytriangleEntityInternational Standard Book NumberEntitychemical compoundEntitydigital object identifierEntitypyramidEntitydegreeEntityequilateral triangleEntityQ180686EntityprismEntitygraphEntityJSTOREntitybibcodeEntityphaseEntityPlatonic solidEntityQ118398Entityprimary colorEntityvertexEntityregular polygonEntityedgeEntityCategoriesBipyramidsComposite polyhedronDeltahedraJohnson solids