Major Arc
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Acute. (More than 180 degrees reflex, between 90 and 180 obtuse)
An angle that measures more than 90 degrees but less than 180 degrees is called an "obtuse" angle. Note Angles less than 90 degrees are called "acute" angles. An angle that is exactly 90 degrees is called a "right" angle. Angles that are more than 90 degrees but less than 180 degrees are call "obtuse" angles. An angle that is exactly 180 degrees is called a "straight line". Angles that are more than 180 degrees and less than 360 degrees are called "reflex" angles.
An obtuse angle is not an exact size, but rather a term used to describe a range of sizes.An obtuse angle is larger than 90 degrees (larger than a right angle) but less than 180 degrees (less than a straight angle).More than 90 degrees but less than 180 degrees.An obtuse angle must be more than 90 degrees and less than 180 degrees.
An arc whose measure is less than 180 degrees is called a Minor Arc.
Acute angles are greater than 0 but less than 90 degrees Right angles are 90 degrees Obtuse angles are greater than 90 but less than 180 degrees Reflex angles are greater than 180 but less than 360 degrees A full turn is 360 degrees