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6. What do you say about the line which is perpendicular to the radius of the circlethrough the point of contact? CBSE 2011​

Answer»

ong>Answer:

There are a lot of lines that are PERPENDICULAR to the radius, but if it is perpendicular to the radius or DIAMETER at the point of tangency, then it is a tangent LINE. The video states that the radius and a tangent line will always be perpendicular, not that any line perpendicular to the radius is a tangent line.

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