Area Related to Circle Chapter 12 Notes
Circumference :-
Measurement of one revolution of a circle is called circumference.
Measurement of one revolution any Closed region = perimeter
circumference of circle = 2𝜋r
where r = radius of circle
perimeter /Diameter of circle = 𝜋
According to indian great Mathematician Aryabhatta(476-550 EBC)
𝜋=62832/20000
𝜋≈3.1416
Another great Indian mathematician Srinivasa Ramanujan (1887–1920) was able to calculate the value of 𝜋 to millions of decimal places using an omniscient.
Area of Circle
A=πr^2
