Define the length of the tangent.
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- The length of a tangentis equal to the length of a line segment with end-points as the external point and the point of contact. So, PA and PB are the lengthsof tangent to the circle from an external point P.
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The length of a tangent is equal to the length of a line segment with end-points as the external point and the point of contact. So, PA and PB are the lengths of tangent to the circle from an external point P.
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