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  1. Regular and Irregular Polygons - Definition, Differences - Math …

  2. Pentagon - Math is Fun

  3. Pentagon - Math.net

  4. Irregular Polygons - Definition, Properties, Types, Formula, Example

  5. The Pentagon – Fundamental Properties with Examples - The …

  6. Irregular Polygons - Definition, Types, Formula - SplashLearn

  7. Definition, Properties | Pentagon Sides | 5 Sided Shape - Cuemath

  8. Regular and Irregular Polygons (Types and Examples) - BYJU'S

  9. What is a Pentagon? Definition, Types, Properties, Examples

  10. 5.20: Regular and Irregular Polygons - K12 LibreTexts