In this section we will discuss about mensuration. Mensuration is the branch of mathematics which deals with the study of different geometrical shapes,their areas and Volume.In the broadest sense, it is all about the process of measurement. It is based on the use of algebraic equations and geometric calculations to provide measurement data regarding the width, depth and volume of a given object or group of objects. While the measurement results obtained by the use of mensuration are estimates rather than actual physical measurements, the calculations are usually considered very accurate.
There are two types of geometric shapes 1) 2D and 2) 3D 2D shapes are 1) Square 2) Rectangle 3) Parallelogram 4) Rhombus 5) Triangle 6) Trapezoid 7) Circle
3D shapes : They have surface area and volume.1) Cube 2) Rectangular Prism (Cuboid) 3) Cylinder 4) Cone 5) Sphere and Hemisphere 6) Prism 7) Pyramid.
Some important formulas of 2D shapes
Name of Shape
Perimeter = 4 x s Area = s x s
Perimeter = 2l + 2w Area = l x w
Perimeter = 2l + 2b Area = base x height
Perimeter 4 x a Area = (d1 x d2)/2
Perimeter = a + b + c Area = (b x h)/2
Perimeter = 3 x a Area = (√3 a 2 ) / 4
Perimeter = sum of all sides Area = (a + b) x h / 2
Circumference = 2 x π x r Area = π x r 2
Circumference = π x r x D Area = (π r 2 )/2
Note:The perimeter of any shape is measured in cm,m, miles or km. The area of any shape is measured in sq.cm,sq.m,sq.km or sq.miles .