- Books Name
- class 7 Mathematics Book
- Publication
- ReginaTagebücher
- Course
- CBSE Class 7
- Subject
- Mathmatics
Area of a circle
A circle
A closed line consisting of all points on the plane that are equidistant from a given point on the plane is called a circle.
Area of circle = πr2, where r is the radius of the circle.
Diameter of Circle:
Diameter = 2⋅Radius = 2r
Radius of circle:
The radius is the distance from the centre to any point on the circle.
Radius is also known as half of the diameter.
Radius=Diameter/2
Area of the Circle:
The area of a circle is the number of square units inside that circle.
Area of the Circle = πr2 sq.units
Here r is the radius of the circle.
The value of the π [pi] can be either 22/7 or 3.14.