Review circle relationships as you answer the questions below.
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,
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.