Question

CD is tangent to circle O at D. Find the diameter of the circle for BC = 13 and DC = 30. Round to the nearest tenth. (The diagram is not drawn to scale.)


A. 82.2

B. 56.2

C. 10.7

D. 69.2

Answer 1

b

Answer 2

let AB=x
there is a theorem which you might have studied according to which

CB*CA = CD^2
=> (CB)*(CB+ BA)=CD^2

solve for BA, which is what you require..

Answer 3

thank you :)

Answer 4

so it is c ???

Answer 5

lol cheating on your exam much @Kailee1423 xD

Answer 6

Hush lol I needed help :P