Geometry: Types Of Angles
In geometry, angles can be classified according to the size
of the angle. The types of angles are right
angles, acute angles, obtuse
angles and straight 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.
An acute angle is an angle measuring between 0 and
90 degrees.

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

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