Class 9 · Mathematics · Ch 6

Mensuration

Measuring Space: Perimeter and Area

14 board marks Medium ~9h to learn

Not started

9 concepts to cover

9 concepts

Perimeter of plane shapesCircumference and pi (irrationality of pi)Length of an arcAreas of rectangles, parallelograms and trianglesHeron's formulaBaudhayana's squaring of a rectangleArea of a circleArea of a sectorBrahmagupta's formula for a cyclic quadrilateral

Quick revision

Under 30 minutes, night-before recap

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Board one-shot

Full chapter in one sitting, Hindi / Hinglish

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Shobhit Nirwan - 9th

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PW Class 9 - NEEV

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English one-shot

Same chapter, English medium

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BYJU'S - Class 9 & 10

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Full revision marathonsFor full-syllabus revision only · 7 multi-hour sessions & playlists

Board one-shot

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Ritik Mishra - 9th & 10th

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Shobhit Nirwan - 9th

HinglishBOARD 11.6 L· 2026YouTube

Marathon

Multi-hour whole-subject sessions that cover this chapter

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Full course playlist

Complete free lecture series for the subject

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Magnet Brains

HinglishBOARD 1.7 L· 2026Playlist

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Magnet Brains

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Recommended teachers

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