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.
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