In Fig. 5, OD is perpendicular to chord AB of a circle whose centre is O. If BC is a diameter prove that CA = 2 OD.

In Fig. 5, OD is perpendicular to chord AB of a circle whose centre is

1.	In Fig. 5, OD is perpendicular to chord AB of a circle whose centre is O. If BC is a diameter prove that CA = 2 OD.
Answer» In Fig. 5, OD is perpendicular to chord AB of a circle whose centre is O. If BC is a diameter prove that CA = 2 OD.