Identifying Angles
Acute, Right, Obtuse
An acute angle measures less than 90 degrees, but more than 0 degrees.
It is smaller than a right angle.
A right angle measures exactly 90 degrees.
An obtuse angle measures more than 90 degrees, but less than 180 degrees.
It is bigger than a right angle.
A straight angle makes a line and measures exactly 180 degrees.
A reflex angle measures more than 180 degrees.
It is bigger than a straight angle.