AB = 16 cm Example 3- The distance between two parallel tangents of a circle of radius 4 cm is (a) 2 cm (b) 4 cm (c) 6 cm (d) 8 cm Solution- (d) Explaination: Reason: Here radius, r = 4 cm Required distance, AB = OA + OB = r + r = 2r = 2×4 = 8 cm 6