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Area of a circle is equal to pi times square of the radius.
A line that is tangent to two circles is called a common tangent of the circles. Common tangent is called external tangent if ...
Each circle is in the exterior region of the other. The distance between the centers of the circles are greater than the sum of their radii.
The perimeter of a circle is equal to two times pi times radius of the circle.
A cyclic quadrilateral is a quadrilateral for which a circle can be circumscribed so that it touches each polygon vertex.
There are three different positions of a line and a circle in a plane. 1. Line and circle don't have a common point. They don't intersect. Online Users
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