Perimeter and Area
CBSE · Class 6 · Mathematics
Summary of Perimeter and Area for CBSE Class 6 Mathematics. Key concepts, important points, and chapter overview.
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Overview
Perimeter is the distance covered along the boundary of a closed figure when it is gone around once. For a polygon, the perimeter is the sum of the lengths of all its sides. Area is the amount of region enclosed by a closed figure, and it is generally measured in square units. Perimeter tells how lo
Key Concepts
The perimeter of any closed plane
The perimeter of any closed plane figure is the distance covered along its boundary when it is gone around once. For a polygon, it is the sum of the l
Perimeter of a rectangle = 2
Perimeter of a rectangle = 2 × (length + breadth). For rectangle ABCD with length 12 cm and breadth 8 cm, the perimeter is 2 × (12 cm + 8 cm) = 40 cm.
Perimeter of a square = 4
Perimeter of a square = 4 × length of a side. For a square photo frame of side 1 m, the perimeter is 4 × 1 m = 4 m.
Perimeter of a triangle = sum
Perimeter of a triangle = sum of the lengths of its three sides. For sides 4 cm, 5 cm, and 7 cm, the perimeter is 16 cm.
Perimeter of an equilateral triangle =
Perimeter of an equilateral triangle = 3 × length of a side. This works because all three sides are equal.
Learning Objectives
- Understand the meaning of perimeter and area
- Find the perimeter of rectangles, squares, triangles, and regular polygons
- Use formulas for perimeter in different shapes
- Understand the meaning of area and measure it in square units
- Find the area of rectangles and squares using formulas
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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