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### Course: Class 8 (Old) > Unit 3

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

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# Diagonal properties of parallelogram

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