Since I can't see the image you mentioned, I'll provide a general explanation based on common angle relationships.
In many cases, if points C, O, and A are on a straight line with point B in between (i.e., C, O, B, and A are collinear), then ∠COB and ∠BOA are supplementary angles. This means that their measures add up to 180 degrees.
Given:
- The measure of ∠BOA = 38°
If they are supplementary, the relationship can be expressed as: \[ \angle COB + \angle BOA = 180^\circ \]
Substituting the known value: \[ \angle COB + 38^\circ = 180^\circ \]
To solve for ∠COB, subtract 38° from both sides: \[ \angle COB = 180^\circ - 38^\circ \] \[ \angle COB = 142^\circ \]
If the context is different (for example, if they are vertical angles), please provide more details for an accurate relationship and equation.
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