FTCE General Knowledge Math Practice Test

What type of angle measures greater than 180°?

1. Acute angle

2. Straight angle

3. Obtuse angle

4. Reflex angle

The correct answer is: Reflex angle

The correct choice is reflex angle, as it is defined as an angle that measures greater than 180° but less than 360°. This means that a reflex angle encompasses the larger portion of the plane around a point, as opposed to the standard acute or obtuse angles which measure less than 180°. An acute angle measures less than 90°, a straight angle measures exactly 180°, and an obtuse angle measures more than 90° but less than 180°. Understanding the definitions and ranges of these angles clarifies why reflex angles are the only type that exceeds 180°.