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Solve the attachment

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User Layton
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Answer:

The measuerment of COB is 67 degrees.

Explanation:

AOB is a straight line meaning that the measurement of AOB is 180° as straight lines are defined to have measurement of 180°.

Given that the measurement of AOC is 113°. Therefore, the sum of ∠AOC and ∠COB must equal to 180°. Thus:


\displaystyle{113^(\circ) + \angle \text{COB} = 180^(\circ)}\\\\\displaystyle{\angle \text{COB} = 180^(\circ)-113^(\circ)}\\\\\displaystyle{\angle \text{COB} = 67^(\circ)}

Therefore, the measurement of COB is 67 degrees.

User Speedyrazor
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