Question: in the given figure ab is a chord of a circle with centre o?
Answer: In the given figure AB is a chord of a circle, with centre O, such that AB=16cm and radius of circle is 10 cm. Tangent at A and B intersect each order at P. Find the length of PA. AL2+OL2=OA2 So we get, OL=6cm Hence,tan(θ)=OAPA=OLAL (PA)=(OA)⋅ALOL Therefore, PA=80/6=40/3.