EntityQ193597· pop 19· linked from 199 articlespentagonal bipyramidSign in to savethird of the infinite set of face-transitive bipyramidsConnectionstriaugmented triangular prismEntitytriangleEntityInternational Standard Book NumberEntityequatorEntityangleEntitychemical compoundEntitydigital object identifierEntityInternational Standard Serial NumberEntitymineralogyEntitypyramidEntitydegreeEntityequilateral triangleEntityQ180686EntityprismEntitygraphEntityJSTOROrganizationbibcodeEntityPlatonic solidEntityOxford University PressEntityQ118398EntityCategoriesBipyramidsDeltahedraJohnson solids