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 ${90}^{\circ }$, and 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 angle greater than ${90}^{\circ }$but less than ${180}^{\circ }$ hence it is an obtuse angle.