Class 6 • Mathematics • Chapter 10
Mensuration
Learn about perimeter and area and understand how measurements are used to solve problems involving squares, rectangles and everyday objects.
Learn the Basics
Important Concepts
Understand perimeter and area step by step.
Perimeter
Learn how to find the total distance around a closed figure.
Perimeter of a Rectangle
Understand how length and breadth are used to calculate a rectangle's perimeter.
Perimeter of a Square
Learn the simple relationship between the side of a square and its perimeter.
Area
Understand area as the amount of surface covered by a plane figure.
Area of a Rectangle
Calculate the area of a rectangle using its length and breadth.
Area of a Square
Find the area of a square using the length of its side.
Quick Formula Guide
Important Formulas
Rectangle Perimeter
2 × (Length + Breadth)
Square Perimeter
4 × Side
Rectangle Area
Length × Breadth
Square Area
Side × Side
Understand with Examples
Worked Examples
Rectangle Perimeter
Length = 12 cm
Breadth = 5 cm
2 × (12 + 5) = 34 cm
Square Perimeter
Side = 8 cm
4 × 8 = 32 cm
Rectangle Area
Length = 10 cm
Breadth = 6 cm
10 × 6 = 60 cm²
Visual Learning
Rectangle: Length & Breadth
Quick Notes
Remember These Points
- • Perimeter is the distance around a closed figure.
- • Area measures the surface covered by a plane figure.
- • Perimeter is measured in units such as cm and m.
- • Area is measured in square units such as cm² and m².
- • Always use consistent units while solving a measurement problem.
Practice
Practice Questions
Find the perimeter of a rectangle with length 12 cm and breadth 5 cm.
Find the perimeter of a square whose side is 8 cm.
Find the area of a rectangle with length 10 cm and breadth 6 cm.
Find the area of a square whose side is 7 cm.
A rectangular garden is 15 m long and 8 m wide. Find its perimeter.
A square tile has a side of 9 cm. Find its area.
Test Yourself
Revise perimeter, area and measurement formulas before taking the quiz.