right angle
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There are typically 3 angles, obtuse, acute, and right. obtuse- an angle that measures over 90° acute- an angle that measures less than 90° right- an angle that measures exactly 90°
A right angle measures 90 degrees
An angle that measures 90 degrees
A angle that is smaller than 90 degrees is an acute angle.
An Obtuse angle is greater than 90 deg; an Acute angle is less then 90 deg.