JCERT · Class 7 · Chapter 21 · Uses of Area in Daily Life. Topic notes aligned to the official chapter; these are not solutions to every textbook exercise.
JCERT · Class 7 · Chapter 21 · Uses of Area in Daily Life. Topic notes aligned to the official chapter; these are not solutions to every textbook exercise.
JCERT · Regular schools (Non-SOE) · Class 7 · Chapter 21 — Uses of Area in Daily Life
Official syllabus pages 283–288. Official syllabus · Prescribed Hindi book (22 chapters) · Separate supplementary reference.
These topic notes and teaching examples are not a complete answer key to every textbook question. English notes use this same JCERT chapter order; a matching English textbook PDF has not been verified.
Split composite regions into familiar shapes. Find a path, shaded region or annulus by subtracting the inner area from the outer area. Convert units consistently and avoid counting shared regions twice.
The circle fits inside the rectangle because its diameter is 14 m.
20 × 14 − (22/7) × 7² = 280 − 154 = 126 m²
The circle fits inside the rectangle because its diameter is 14 m.
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