Class 4 (SSC) • Mathematics (गणित)Chapter 9: Geometry - Perimeter⭐ Topic 1
Geometry - Perimeter
Perimeter is the total distance around a shape, calculated by adding the lengths of all its sides, useful for measuring boundaries.
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Fun picture
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Learn the idea step by step
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Know it
Perimeter is found by adding the lengths of all sides of a shape, like a rectangle's perimeter being 2×(length+width).
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See the pattern
For a square, since all sides are equal, the perimeter is calculated as 4 times the length of one side.
Quick revision
Remember these!
- Perimeter = total distance around a shape.
- Rectangle perimeter = 2×(length+width).
- Square perimeter = 4×side length.
- Irregular shapes: add all side lengths.
- This gives total perimeter.
- Perimeter measures boundaries.
- Real-life use: garden fencing.
- Practice builds perimeter calculation skills.
Words to know
geometry - perimeterssc class 4