Videos, worksheets, stories and songs to help Grade 6 students learn about types of angles: acute angles, right angles, obtuse angles, straight angles, reflex angles and full rotation angles.

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More Grade 6 math Lessons

Angle Games

Right Angle (Quarter-Turn) – Two rays that connect to form a square corner.

Straight Angle (Half Turn) – Two rays that connect to form a straight line.

Acute Angle – An angle with a measure less than a right angle (half turn)

Obtuse Angle – An angle with a measure greater than a right angle but less than a straight angle.

Reflex Angle – An angle with a measure greater than a straight angle.

Note that an acute or obtuse also has a reflex angle on the outside of its arms.

The following figures show the different types of angles: Right angle, Straight angle, Acute angle, Obtuse angle and Reflex angle. Scroll down the page for more examples and solutions.

**Introduction to Angles and Angle Types**

Angles are used to measure the amount of turn.

This video shows you: How are angles formed? How do we classify angles? What are the different types of angles?

Types of Angles: Acute, Right, Obtuse, Straight, Reflex, & Complete

**Classifying Angles**

Identify acute, obtuse and right angles.

**What is an angle is and how angles are measured?**

It demonstrates the measuring of angles with a protractor.

It goes over different classifications of angles such as acute angles, right angles, obtuse angles, straight angles, reflex angles and full rotation angles.

**Types of Angles**

This video illustrates acute, right, obtuse, straight, reflex, and full angles.

**Angles Music Video**

A song about the types of angles and the degrees of the different types of angles.

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