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Review circle relationships as you answer the questions below. Homework Help ✎

  1. On your paper, draw a diagram of with . If and the length of the radius of is , find the length of chord .

According to the Law of Cosines,


  1. Now draw a diagram of a circle with two chords, and , that intersect at point . If , , and , what is ?

Remember that intersecting chords create similar triangles, and that the corresponding sides of similar triangles have equal ratios.