Which angles are obtuse?

Answer 1

all angles that are more then 180 degrees.

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No, angles which arer more than 180 degrees are called reflex angles. An obtuse angle is one whose measure is between 90 and 180 degrees. It is, therefore, always smaller than 180 degrees.

Answer 2

The angles that are obtuse are the ones that have angles bigger than a right angle or 90 degrees. But they are smaller than a 180 degree or straight angle.