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Angles greater than 90 but less than 180 degrees are obtuse angles Angles greater than 180 but less than 360 degrees are reflex angles
Greater than zero, less than 90 - Acute Equal to 90 - Right Greater than 90, less than 180 - Obtuse Equal to 180 - Straight Greater than 180, less than 360 - Reflex (all measures are in degrees).
They are obtuse angles.
Two angles that are more than 90° and less than 180°.
A convex angle is any angle of 180 degrees or less. So all angles less than 90 degrees are certainly convex angles, but so are the angles between 90 and 180 degrees.