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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. types of angles


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.

right angle

The following video explains more about right angles.


 

Acute Angles

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

acute angle 40 deg

Obtuse Angles

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

obtuse angle

Straight Angles

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

straight angle

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.

reflex angle

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.

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