1. Find the correct answer

1. If \(AB = 12 cm\), \(BC = 16 cm\) and \(AB\) is perpendicular to \(BC\), then the radius of the circle passing through the points \(A, B\) and \(C\) is 

 

2. In the figure, if \(∠ABC = 20^°\), then \(∠AOC\) is equal to: (A)  (B) 40° (C) 60° (D) 10°