AREA
Definition: A surface covered by specific shape is called area of that shape. i.e. area of square, circle etc.
1. Square:
Where L = L Length of side
So if L = 5 cm
Then Area = 5 x 5 = 25 cm2

2. Rectangle:
Where,
L = Length
B = Width
If L = 10 mm, And B = 6 mm
Then, Area = 10 x 6 = 60 mm2
3. Circle:
Where D = Diameter of the circle
Same way we can find out area of quarter of circle

Where D = Diameter of Greater Circle
d = Diameter of Smaller Circle

Where B = Base of Triangle
H = Height of Triangle
5. Cylinder:
where H = Height of Cylinder
D = Diameter of Cylinder

VOLUME
Definition: A space covered by any object is called volume of that object.
In square block; length, width and height are equal, so
2. Rectangular Block:
Where
L = Length
B = Width
H = Height

Volume of Cylinder = Cross Section Area x Length of Cylinder
Where
D = Diameter of the Cylinder
H = Length of Cylinder

4. Prism or Triangle Block:
Volume of Triangle Block = Cross Section Area of Triangle x Length (Area of Right Angle Triangle = 1/2 B H)
Where
B = Base of Right Angle Triangle
H = Height of Right Angle Triangle
L = Length of Right Angle Triangle

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