Mensuration Class 6 Maths Notes - Chapter 10

Mensuration is a branch of mathematics which is a topic in Geometry. It is a study of various geometrical shapes, their length, breadth, volume, and area for 2D as well as 3D shapes. Some important terminologies included in this topic are covered below.

  • Perimeter – It is defined as the length of the edges of a figure. It is represented by the alphabet P and is measured in cm, m, km, miles.
  • Area – It is defined as the surface covered by a given closed shape. It is represented by the alphabet A and can be measured in the unit sq.cm,sq.m, sq.miles or sq.km

Type

Rectangle

Square

Triangle

Perimeter

2 × (length + breadth)

4 × length of one side

For equilateral triangle: 3 × length of one side

Area

length x breadth

side x side

(hbb) / 2

Questions On Mensuration

  1. An athlete takes 5 rounds of a park which is rectangular in shape. The park is 45 m long and 20 m wide. What is the total distance covered by the athlete?
  2. Shalini takes 3 rounds of a square park. Each side of the park is 68 m. Calculate the distance traveled by Shalini.
  3. What is the perimeter of a triangle with sides measuring 15 cm, 18 cm, and 20 cm?
  4. Find the area of a rectangle whose length is 11 cm and breadth is 6 cm.
  5. A piece of cloth is 2m 25 cm wide and 3 m long. Find the area in a square meter.

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Practise This Question

In a set of natural numbers there exists a definite largest number.