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### Mensuration Formula PDF

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#### Mensuration Formula for Octahedron ( अष्टफलकीय)

PDF महत्वपूर्ण जानकारी
Pages 41
PDF Size 1.49 MB
language Hindi

General Science Notes

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### Mensuration Problems

Question: Find the area and perimeter of a square whose side is 5 cm.

Solution:

Given:

Side = a = 5 cm

Area of a square = asquare units

Substitute the value of “a” in the formula, we get

Area of a square = 52
A = 5 x 5 = 25

Therefore, the area of a square = 25 cm2

The perimeter of a square = 4a units

P = 4 x 5 =20

Therefore, the perimeter of a square = 20 cm.

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### What is mensuration in Maths?

In maths, mensuration is defined as the study of the measurement of various 2D and 3D geometric shapes involving their surface areas, volumes, etc.

### What is the difference between mensuration and geometry?

Mensuration refers to the calculation of various parameters of shapes like the perimeter, area, volume, etc. whereas, geometry deals with the study of properties and relations of points and lines of various shapes.

### What are 2D and 3D Mensuration?

2D mensuration deals with the calculation of various parameters like area and perimeter of 2-dimensional shapes like square, rectangle, circle, triangles, etc.

3D mensuration is concerned with the study and calculation of surface area, lateral surface area, and volume of 3-dimensional figures like a cube, sphere, cuboid, cone, cylinder, etc.