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Class 9 · Ganita Manjari · Unit 12: Quadrilaterals

Diagonals as a Diagnostic Tool

Lesson 3 of 3
Diagonals of a **parallelogram** bisect each other. Add **equal diagonals** — you get a rectangle. Add **perpendicular diagonals** — you get a rhombus. Add both — you get a square.
Gyaan Maths — CBSE Class 6-12, built for board-toppers.
v1.1 · Sept 2026