Q1
The perimeter of a square with side 5 cm is:
A20 cm
B25 cm
C10 cm
D15 cm
CBSEClass 6 (CBSE)MathematicsCh 6 · Topic 1
Perimeter of Plane Figures
Learning to calculate the perimeter of simple shapes.
Core concept
Perimeter has many practical applications — calculating the amount of fencing needed to enclose a garden, the length of ribbon needed to go around a box, or the distance covered walking once around a park's boundary. For irregular shapes, perimeter is still found by adding all side lengths, even if the formula isn't as simple as for regular shapes like squares and rectangles.
Exam highlight
Key diagram
- Show a rectangle and square with sides labeled and the perimeter formula applied.
Keywords worth remembering
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Quick notes
• Perimeter of rectangle = 2(length + breadth); perimeter of square = 4 × side.
• Perimeter is the total boundary length, measured in linear units.
• Practical uses: fencing, ribbon length, distance walked around a boundary.
• For irregular shapes, perimeter is found by adding all side lengths directly.