Chapter 3.3 (Математика 4)

Периметр тре­уголь­­ника, прямо­угольни­ка и квад­рата

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Chapter topics:

  1. Периметр тре­уголь­­ника, прямо­угольни­ка и квад­рата
  2. Периметр треуголь­ника
  3. Периметр прямоуголь­ника
  4. Периметр квадрата

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