Answer:
The radius is 10.2
Step-by-step explanation:
Using Pythagoras'theorem,
AC^2 = AB^2 + BC^2
AB^2 = AC^2 - BC^2 = 19^2 - 16^2 = (19 - 16)((19 + 16) = (3)(35) = 105
AB^2 = √105 = 10.2
