semicircles, isosceles triangle, equilateral triangle, tetrahedrons, octagons, ellipsoid, rectangle, parallelogram, rectangular, gnomon, pentagonal, ellipse, equilateral, ogee, crossbeams, gothic arch, polyhedra, cuboid, dodecahedron, plumb bob, pediments, trapezoids, frustum, conic, pilasters, tenons, armillary sphere, hex nut, crenellations, ovoid, hexagons, darning needle, metopes, mullions, octahedron, spheroid, zodiacal light, cabriole, crosspieces, countersink, oblong, newel post, plastron, bullnose, pentagons, curved, diagonals, tesserae, dihedral, satin stitch, caryatids, apse, campanile, domelike, wingspread, crosshatch, allen wrench, coved, stelae, lattice, arches, cube, tetrahedral, parfait glass, binnacle, collinear, forewings, cruciform, antiparallel, arcsecond, longways, cylindrical, corbel, icosahedral, reeded, hexagonal, fletching, spearlike, convex lens, scaffoldings, checkerboards, concave, rhomboid, ovate, quasicrystal, conical, armillary, quoins, rock outcrop, geodesic, lunette, boxlike, embroidery hoop, grillwork, arcuate, obelisks, moonlet, mantling, rhombus, perpendicularly, celestial sphere, iconostasis

prism