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Measuring Space: Perimeter and Area Class 9

CBSE

Perimeter and area of triangles, rectangles and circles, including Heron’s formula, arcs and sectors.

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Topic-wise short notes with solved examples.Open PDFDownload
Every formula and result of the chapter on one sheet.Open PDFDownload
Daily practice problems with an answer key.Open PDFDownload

What this chapter covers

  • Perimeter and the number π
  • Length of an arc
  • Area of rectangles, parallelograms and triangles
  • Heron's formula
  • Brahmagupta's formula for a cyclic quadrilateral
  • Squaring a rectangle
  • Area of a circle
  • Sector and segment of a circle

The short notes explain each of these topics with solved examples, the formula bank lists every result on one sheet, and the DPP sheet gives practice questions with an answer key.

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