# Posts Tagged ‘algebra’

### Definition of a Parallelogram – YourTeacher.com – Geometry Help

www.youtube.com - In this lesson, students learn the definition of a parallelogram, which states that if a quadrilateral is a parallelogram, then opposite sides are parallel. Students also learn the following theorems related to parallelograms. If a quadrilateral is a parallelogram, then ... read more ›