AIR MATH

Math Question

In \( \bigcirc 0, \mathrm{mCD}=80^{\circ} \) and \( \overline{\mathrm{CA}} \cong \overline{\mathrm{BD}} \). Also, the center of the circle, point \( O \), is the intersection of \( \overline{C B} \) and \( \overline{A D} \). What is \( m \angle 1 ? \)

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