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What type of angle is between 90 and 180 degrees?

  1. Obtuse

  2. Right

  3. Acute

  4. Scalene

The correct answer is: Obtuse

An obtuse angle is any angle that measures greater than 90 degrees but less than 180 degrees. Option B, a right angle, is exactly 90 degrees, so it falls outside of the given range. Option C, an acute angle, measures less than 90 degrees and is therefore also outside of the given range. Option D, scalene, is a term used to describe a type of triangle, not an angle, making it an incorrect choice.