A angle that is smaller than 90 degrees is an acute angle.
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An angle that measures greater than 90 degrees but less than 180 degrees is an obtuse angle.
An angle of 105 degrees is classified as an obtuse angle, as it measures greater than 90 degrees but less than 180 degrees. In geometric terms, an obtuse angle is one that is between 90 and 180 degrees. This means that the angle is larger than a right angle (90 degrees) but smaller than a straight angle (180 degrees).
Well, honey, if you're talking about an angle that measures 170 degrees, you're looking at an obtuse angle. It's bigger than a right angle but smaller than a straight angle. So, grab your protractor and get measuring!
An obtuse angle.
An acute angle is an angle measuring less than 90 degrees. An obtuse angle is an angle which is more than 90 degrees, but less than 180. A reflex angle is an angle which measures more than 180 degrees, but less than 360. So an angle of 97 degrees is an obtuse angle.