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Question
In the following figure, ∠AOC and ∠BOC form a pair of ______.

Options
vertically opposite angles
complementary angles
alternate interior angles
supplementary angles
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Solution
In the following figure, ∠AOC and ∠BOC form a pair of supplementary angles.
Explanation:

Since, ∠AOC and ∠BOC are on the same line AOB and forming linear pair.
∴ ∠AOC + ∠BOC = 180°
Hence, ∠AOC and ∠BOC are supplementary angles.
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