• Mar 15, 2026 Penta Hexa Hepta Octa Nona Deca concepts can greatly aid retention. Penta (5): Think of a pentagon (five-sided polygon) or pentagram (five-pointed star). Hexa (6): Visualize a hexagon (six-sided polygon) or the six faces of a cube. Hepta (7): While l By Miss Tracey Leuschke