Question

Which of the following is/are true about $\angle COB$ and $\angle BOA?$

• A. Adjacent angles
• B. Supplementary angles
• C. Linear pair
• D. Acute angles

Answer 1

Answer: (A), (D)

The correct options are
A Adjacent angles
D Acute angles

$\angle COB$ and $\angle BOA$ are adjacent angles as they share a common arm OB, a common vertex O and do not overlap.

$\angle COB$ and $\angle BOA$ do not add up to 180°. Hence, they cannot be supplementary angles.

Non common arms of $\angle COB$ and $\angle BOA$ do not form a line. Hence, they are not a linear pair.

$\angle COB$ and $\angle BOA$ are angles less than 90°. Hence, they are acute angles.