Mathematics ACT Aspire Practice Test

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Study for the Mathematics ACT Aspire Test. Use flashcards, multiple choice questions, and detailed explanations. Get prepared for your exam!

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What do you call an angle that is greater than 90 degrees but less than 180 degrees?

Acute angle
Right angle
Obtuse angle
Straight angle

The correct answer is: Obtuse angle

An angle that is greater than 90 degrees but less than 180 degrees is called an obtuse angle. By definition, an acute angle is one that measures less than 90 degrees, while a right angle measures exactly 90 degrees. A straight angle, on the other hand, measures exactly 180 degrees. Therefore, the definition of an obtuse angle fits perfectly within the given measurement range, distinguishing it from the other types of angles. Understanding this classification is essential in geometry, as it helps in identifying and working with different angle types in various mathematical problems.