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Course: Class 9 (OD) > Unit 11
Lesson 4: Properties of a parallelogram- Proof: Opposite sides of a parallelogram
- Proof: Opposite angles of a parallelogram
- Side and angle properties of a parallelogram (level 1)
- Side and angle properties of a parallelogram (level 2)
- Proof: Diagonals of a parallelogram
- Diagonal properties of parallelogram
- Proof: Rhombus diagonals are perpendicular bisectors
- Rhombus diagonals
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