prove that the tangent at any point of a circle is perpendicular to the radius though the points of contact
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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.
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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.
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