# Angle types review

Review the following types of angles: acute, right, obtuse, and straight. Identify and draw types of angles in some practice problems.

### Summary of angle sizes

Angle type | Angle size (in degrees) |
---|---|

Acute | Between and |

Right | Exactly |

Obtuse | Between and |

Straight | Exactly |

### Right angles

A right angle is a angle. A right angle is in the shape of a perfect corner, like the corner of a rectangular sheet of paper. Below is an example of a right angle.

### Straight angles

A straight angle is a angle. A straight angle looks like a straight line. Below is an example of a straight angle.

### Acute angles

An acute angle is an angle whose degree measure is less than . Below is an example of an acute angle.

When we compare an acute angle to a , we can see that an acute angle is less than .

### Obtuse angles

An obtuse angle is an angle whose degree measure is greater than but less than . Below is an example of an obtuse angle.

When we compare an obtuse angle to a , we can see that an obtuse angle is greater than .

When we compare an obtuse angle to a , we can see that an obtuse angle is less than .

*Want to learn more about angle types? Check out this video.*

### Practice set 2: Angles in diagrams and images

*Want to try more problems like this? Check out this exercise.*