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Mathematics

Parallelogram properties

समांतर चतुर्भुज के गुणधर्म

In this Class 9 Mathematics topic from the chapter Quadrilaterals, students explore the defining properties of a parallelogram and learn how to apply them in geometric reasoning. They study why opposite sides are parallel and equal, opposite angles are equal, adjacent angles are supplementary, and the diagonals bisect each other. The topic also develops proof-writing skills and helps students identify missing angles, lengths, and relationships in diagrams using these properties.

Practice questions

One angle of a parallelogram is 82°. What is its adjacent angle?