Question

Solve for x. Assume that lines which appear tangent are tangent. X=

Answer 1

50

Explanation:

tangent-secant theorem

Answer 2

x = 32

Explanation:

(whole secant) x (external part) = (tangent)^2

(x+18) * 18 = 30^2

(x+18) * 18 = 900

Divide each side by 18

(x+18) * 18/18 = 900/18

(x+18) = 50

Subtract 18 from each side

x+18-18 = 50-18

x=32