Mathematics made fun. Here is the general geometrical formulae for student – class 8 to 12. Formulae for perimeter, area and volume of rectangle, square, triangle, parallelogram, circle, cylinder, cuboid etc.
Perimeter is the total length of the path that encompasses/ surrounds/ outlines a shape. Eg. Sum of lengths of 4 sides of a rectangle is the perimeter of rectangle (2D).
Area is the amount of space enclosed inside the perimeter of that shape (2D).
The space between the walls of the 3D object is measured as volume of that object (3D).
General Geometric Shapes ( Area – Perimeter)
A = πr2
P = 2 πr
A = Breadth x Height
P = 2( sum of two adjecent sides)
A = Length x Width
P = 2(Length + Width)
A = s2
P = 4S
A =1/2 x Height x(b1xb2)
P = side1 + side2 + side3 +side4
A =1/2 x B x Perpendicular H
P = Sum of all the three sides of a triangle
Triangle ( Right Triangle)
A=√(s(s−a)(s−b)(s−c)) where s=(a + b + c)2
P = a+b+√(a2+b2)
Volume of Shapes
s is the length of the side.
Right Rectangular Prism
L is the length, W is the width and H is the height.