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85. prove that tangentdrawn at any,point of circle is perpendicular tothe radius through the point ofcontact​

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Answer:

Construction : Take a point B, other than A, on the tangent l. ... Proof: We know that, among all line SEGMENT JOINING the point O to a point on l, the PERPENDICULAR is shortest to l. OA = OC (Radius of the same circle) Now, OB = OC + BC.

Step-by-step explanation:

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