A circle subtends 360° . Therefore. if the angle subtended at the centre of a circle by an arc is greater than 180° then this is the major arc. By comparison, the minor arc will subtend an angle less than 180°
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A major arc must measure over 180 degrees, or pi radians
An arc whose measure is less than 180 degrees is called a Minor Arc.
An angle greater than 90° and less than 180° is called an obtuse angle.
A reflex angle
Reflex means the left over of the circle but it measure is greater than 180 degrees and less than 360 degrees. :D