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.
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.
Practice Types of Angles with the following worksheets
Types of Angles
- Acute, Obtuse, Reflex
Angles in a straight line
Angles at a point
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.
An acute angle is an angle measuring between 0 and
An obtuse angle is an angle measuring between 90
and 180 degrees.
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.
A reflex angle is an angle measuring between 180 and 360 degrees.
A full angle is an angle of one complete turn which is 360 degrees.
An angle of one whole turn is 360˚.
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