A circle is centered at $O$, $\overline{AB}$ is a diameter and $C$ is a point on the circle with $\angle COB = 50^\circ$.  What is the degree measure of $\angle CAB$?
Question:
A circle is centered at $O$, $\overline{AB}$ is a diameter and $C$ is a point on the circle with $\angle COB = 50^\circ$.  What is the degree measure of $\angle CAB$?
Answer:
Let's think step by step.

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25^\circ
A circle is centered at $O$, $\overline{AB}$ is a diameter and $C$ is a point on the circle with $\angle COB = 50^\circ$.  What is the degree measure of $\angle CAB$?
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