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Arc measure with equations

In the figure below, AC‾\overline{AC} and BD‾\overline{BD} are diameters of circle PP.
What is the arc measure of BC⌢\stackrel{\LARGE{\frown}}{BC} in degrees?
  • Your answer should be
  • an integer, like 66
  • a simplified proper fraction, like 3/53/5
  • a simplified improper fraction, like 7/47/4
  • a mixed number, like 1 3/41\ 3/4
  • an exact decimal, like 0.750.75
  • a multiple of pi, like 12 pi12\ \text{pi} or 2/3 pi2/3\ \text{pi}
∘^\circ