(a.) Having five corners or angles.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). pentagonal. Retrieved September 20, 2026, from http://smartdefine.org/pentagonal/definitions/2043451 |
| Chicago | Webster's. 2011. "pentagonal" http://smartdefine.org/pentagonal/definitions/2043451 (accessed September 20, 2026). |
| Harvard | Webster's 2011, pentagonal, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/pentagonal/definitions/2043451>. |
| MLA | Webster's. "pentagonal" 27 May 2011. Web. 20 September 2026. <http://smartdefine.org/pentagonal/definitions/2043451> |