What type of angle is greater than 90°?

The story behind the answer

An obtuse angle is any angle measuring greater than 90° and less than 180°, so it’s wider than a right angle. By contrast, an acute angle is less than 90°, a right angle is exactly 90°, and a straight angle is exactly 180°.

In geometry, classifying angles helps describe shapes and solve problems: for example, an obtuse triangle has one obtuse angle and two acute ones. To remember, think OBtuse = Over ninety, Below 180. Or: acute is a “cute,” small angle; right is “just right” at 90°; straight lies flat at 180°. A quick protractor check: if it opens wider than the square corner of paper, it’s obtuse.