# Geometry: Types Of Angles

In geometry, angles can be classified according to the

size
of the angle.

In these lessons, we will learn the following types of angles:

right angles, acute angles, obtuse angles, straight angles, reflex angles and full angles.

Related Topics:

More Geometry Lessons
The following table shows the different types of angles: right angles, acute angles, obtuse angles, straight angles, reflex angles and full angles. Scroll down the page if you need more explanations about each type of angles, videos and worksheets.

The following video will demonstrate and distinguish between the different types of angles: right, acute, obtuse, straight, reflex and full angles.

## Worksheets

Practice Types of Angles with the following worksheets

Types of Angles - Acute, Obtuse, Reflex

Angles in a straight line
Angles at a point
Geometry Worksheets
## Right Angles

A **right angle** is an angle measuring **90** degrees. Two
lines or line segments that
meet at a right angle are said to be perpendicular.

The following video explains more about right angles.

## Acute Angles

An **acute angle** is an angle measuring between **0** and
**90** degrees.

## Obtuse
Angles

An **obtuse angle** is an angle measuring between **90**
and **180** degrees.

## Straight
Angles

A **straight angle**
is a straight line and it measures **180** degrees.

The following video shows the differences between a right, acute, obtuse and straight angle.

## Reflex Angles

A reflex angle is an angle measuring between **180** and **360** degrees.

## Full Angles

A full angle is an angle of one complete turn which is 360 degrees.

An **angle of one whole turn** is 360˚.

You can use the Mathway widget below to practice Algebra or other math topics. Try the given examples, or type in your own problem. Then click "Answer" to check your answer.