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Different Types of Angles

An angle is a fraction of a circle measured in degrees. A whole circle is 360 degrees. There are four types of basic angles students in elementary school study in geometry. They are as follows.

Acute: an angle whose measure is less than 90 degrees.

acute angle
Right: an angle whose measure is exactly 90 degrees.

right angles
Obtuse: an angle whose measure is bigger than 90 degrees but less than 180 degrees.

obtuse angle
Straight: an angle whose measure is 180 degrees.

straight angles

Classify angles

Before kids learn to measure angles with a protractor, they learn to classify the angles. We have created a set of grade 5 worksheets to help your child learn to classify the angles.

classifying angles worksheet
Classify and measure angles

We’ve also created worksheets for classifying and measuring angles with a protractor.

measure and classify angles worksheet
If you are looking for other grade 5 geometry worksheets, we’ve created this page of topics covered in this grade.