Question: two tangents rq and rp are drawn from an external point?
Answer: In the given figure, two tangents RQ and RP are drawn from an external point R to the circle with centre O. If ∠PRQ = 120o, then prove that OR = PR + RQ. Construction, Join OP and OQ. ... Since, the tangent at any point of a circle is perpendicular to the radius through the point of contact.