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12-9.
  1. Use circle relationships to solve for the variables in each of the diagrams below. Homework Help ✎

  2. 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