3. The length of the tangent drawn from external point are always equal to the length of the radius of the circle is it true or false?
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It is known that a tangent at any point of a circle is perpendicular to the radius through the point of contact. Therefore triangle OPA is congruent to triangle OPB by RHS criterion. Thus, it is proved that the lengths of the two tangents drawn from an external point to a circle are equal.
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