Line AB is tangent to circle O. If 16 and BC = 18, what is AB?
The diagram is not to scale.
A. 34
B. 30
C. 46
Presumably you mean OC = OA = 16.
If so you have a right-angled triangle with hypotenuse = 16 + 18 → 34
Use Pythagoras: AB = sqrt(34^2 - 16^2) → 30
+188 
