Classify angle types

4th Grade Math practice: Is a 120-degree angle acute, right, or obtuse. Part of angles (Angles).

~8 min

Acute angles are less than a right angle, right angles are 90 degrees, and obtuse angles are greater than 90 degrees and less than 180 degrees.

Right Angles

90°

right angle

A right angle forms a perfect square corner and measures exactly 90 degrees.

💡 Look for a small square symbol in the corner of the angle; it means it's exactly 90 degrees.