Mathematics
Brahmagupta’s formula
In Class 9 Mathematics, students explore Brahmagupta’s formula as part of Area and Perimeter. The formula helps find the area of a cyclic quadrilateral when the lengths of all four sides are known. Students learn to calculate the semiperimeter first, substitute the side lengths carefully, simplify the square-root expression, and express the area in square units. Worked examples connect the formula with geometric diagrams and encourage checking whether the given quadrilateral satisfies the required cyclic condition.
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- Class / subject
- 9 · Mathematics
- Chapter
- Area and Perimeter
- Topic
- Brahmagupta’s formula
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