Find x. assume that segments that appear tangent are tangent.

show me how to do it ,!

Assuming that CB is tangent, this is just a right triangle with a hypotenuse of 20 and a side of 12 so by the Pythagorean Theorem:

20^2=12^2+x^2

400=144+x^2

x^2=400-144

x^2=256

x=16

You didn’t put the necessary image to solve the question : p