Class 9 NCERT (CBSE and ICSE) Area of a Rhombus
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2. Polynomials
7. Triangles
10. Circles
11. Constructions
12. Heron's Formula
14. Statistics
15. Probability
16.1.1. Area of a Quadrilateral
16.1.2. Area of a Parallelogram
16.1.3. Area of a Rhombus
16.1.4. Area of a Trapezium