In this math video we will learn how to calculate the area of a circle and how to find the area of a ring.
The distance around a circle is called the circumference.
The surface inside a circle is called the area of the circle.
A segment connecting the center of a circle with any point from the circle is called radius.
A segment that passes through the center of a circle and connects two opposite points from the circle is called diameter.
The radius is half the diameter.
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