Question

Refer to the figure below, which of the given options is correct?

• A. ABD is an acute angle.
• B. ABD is an obtuse angle.
• C. ABD is reflex angle
• D. can't say

Answer 1

The correct option is A

ABD is an acute angle.

An acute angle measures between $0^{\circ }$ and ${90}^{\circ }$,
An angle greater than${90}^{\circ }$ but less than ${180}^{\circ }$ is called an obtuse angle.
From the given figure we can see that$\angle$ABD is less than ${90}^{\circ }$ and greater than $0^{\circ }$,
Hence, it is an acute angle.
Similarly$\angle$CBA is greater than ${90}^{\circ }$ but less than ${180}^{\circ }$, hence it is an obtuse angle.