Useful mathamatical formule

Area of  a rectangle
Length X breadth
Area of a triangle
1/2length X breadth
Area of a circle
∏ X radius2
Diameter of a circle
Radius X 2
Circumference of circle
∏ X diameter
Volume of sphere
4/3 ∏ X radius3
Surface of a sphere
4 X ∏2
Volume of a cylinder
∏ X radius2 X height
Curved area of cylinder
2 X ∏ X radius X height
Area of cone
∏ X radius X length
Volume of cone
1/3 ∏ X radius2 x height
∏  = pi,  pi = 3.14159265


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