Explain Externally Tangent Circles

Introduction:

                Two intersect circles in a single point is known as tangent circles. It can be divided into two types of tangency: internal and external. By using the tangent circles many problems and geometry constructions are solved. This type of problems have real-life applications. The followings are some real-time applications: trilateration and maximizing the use of materials.

Example:

               A tangent that is common to two circles and does not intersect the segment joining the centers of the geometry circles is called Common External Tangent. A common tangent can be any one of the following:External tangent or Internal tangent.
                                                   
   From the above figure, we can see that line PQ is the common external tangent.


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