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  1. Apothem of a Pentagon - Formulas and Examples - Neurochispas

  2. Pentagon Calculator

  3. Apothem- Definitions, examples and formula. - Cuemath

  4. Apothem of a polygon - Math Open Reference

  5. Pentagon Calculator and Formulas - CalcTool

  6. Pentagon - Math.net

  7. Regular Polygon Calculator

  8. Apothem of a Pentagon Calculator Online

  9. Apothem of Pentagon Calculator

  10. Apothem of Pentagon Formula - easycalculation.com