### Home > INT2 > Chapter 12 > Lesson 12.1.1 > Problem 12-9

12-9.

Use circle relationships to solve for the variables in each of the diagrams below. Homework Help ✎

a.

*AB*and*CD*intersect at*E*b. Point

*C*is the center.

(*CE*)(*ED*) = (*AE*)(*EB*)

(*k*)(*k*) = (18)(8)

Draw a perpendicular bisector on the chord to the center

of the circle, and then create two triangles.

*r* ≈ 11.83