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How to find the radius of a circle,using a tangent line.
This video shows how to apply the following Theorem in order to find the radius of a circle.
Theorem 6.1 In a plane,a line is tangent to a circle if and only if the line is perpendicular to a radius of the circle at its endpoint on the circle.
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Tagged under: tangent,radius,circles,segment,segments,line,geometry
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