Classification of Angles by SizeDate: 09/30/2008 at 07:54:22 From: Dierra Subject: Angle greater than 180 What do you call an angle greater than 180 degrees? Date: 09/30/2008 at 10:41:02 From: Doctor Ali Subject: Re: Angle greater than 180 Hi Dierra! Thanks for writing to Dr. Math. Angles more than 180 degrees and less than 360 degrees are called reflex angles. By the way, you may also be interested to know: Angles less than 90 degrees are called acute angles. An angle that is exactly 90 degrees is called a right angle. Angles greater than 90 degrees and less than 180 degrees are called obtuse angles. An angle that is exactly 180 degrees is called a straight angle. You might want to read an article from our archives that talks about how to remember which name goes with which type of angle: Angles: Acute, Right, Obtuse, Reflex http://mathforum.org/library/drmath/view/57840.html Does that help? - Doctor Ali, The Math Forum http://mathforum.org/dr.math/ |
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