Mathematics ACT Aspire Practice Test

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Study for the Mathematics ACT Aspire Test. Master concepts through a mix of questions. Dive into explanations and hints for a thorough understanding. Elevate your test readiness!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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Which of the following describes a right angle?

Exactly 45 degrees
Exactly 90 degrees
Exactly 120 degrees
Exactly 180 degrees

The correct answer is: Exactly 90 degrees

A right angle is defined as an angle that measures exactly 90 degrees. This angle is one of the fundamental angles in geometry and is commonly seen in various shapes, including squares and rectangles, where each corner forms a right angle. The other options represent different angles: 45 degrees describes an acute angle, which is less than 90 degrees; 120 degrees is an obtuse angle, which is greater than 90 degrees; and 180 degrees represents a straight angle, which forms a linear pair. Hence, defining a right angle simply as 90 degrees is accurate and aligns with the standard conventions in geometry.