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The following applications may take some time to load depending on connection speed. Please wait. A line that is tangent to two circles is called a common tangent of the circles. Common tangent is called external tangent if the point of tangencies of the circles lie on the same side of the center line. Common tangent is called internal tangent of the circles if the common tangent intersect the center line between the centers of the circles. Two common tangents are equal in length.You can investigate the applications by moving the empty squared points.
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Solids