CIRCLE

Circle is also a two dimensional plane figure. The only difference is that it has no sides.

Circle is nothing but the set of all points that are in same distance from the centre.

Circle has three things in it. Now they are

• Radius i.e distance from the center onward.
• Diameter i.e it is a line drawn across the center in a circle.
• Circumference i.e Distance once around the circle.

And in detail to define we have 

• Diameter= 2*radius
• Circumference=2*π*radius.

image of a circle