Question

The figure consists of a chord, a secant, and a tangent to the circle. The diagram is not drawn to scale.What is the value of x? Round the answer to the nearest unit.

Answer 1

http://en.wikipedia.org/wiki/Circle#Theorems

the secant-tangent theorem says that
16^2 = 8*(y+12)
where y is missing length of secant line
--> y = 20

the chord theorem tells us that
4*x = 4*20
--> x = 20

Answer 2

THANK YOU SO MUCH!!!!!!!!!!!!!!!!!!!

Answer 3

haha your welcome