An angle measuring more than 90 degrees is obtuse. An angle measuring less than 90 degrees is acute. An angle measuring 90 degrees is right.
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obtuse angle
An angle measuring more than 90 degrees is considered an obtuse angle. However, if the angle is exactly 180 degrees, then it is considered a straight angle.
An angle which measures exactly 90 degrees is called a "right" angle. (One measuring less than 90 is 'acute', and one measuring more than 90 degrees is 'obtuse'.)
If less than 180 degrees it is an obtuse angleMore than 180 degrees a reflex angleobtuse
obtuse: greater than 90 degrees right: 90 degrees acute: less than 90 degrees