Montessori Derivation of Formula: Area of Common Parallelogram Presentation includes following contents: Parts of Common ParallelogramProving equivalency between rectangle and common parallelogramArea of rectangle (formula)Area of Common Parallelogram (formula)ExamplesWorkbook Information: Workbook is available at: https://www.teacherspayteachers.com/Product/Montessori-Derivation-of-Formula-Area-of-Common-Parallelogram-Workbook-8482913This video has NO SOUND. A teacher should explain the conten