Which term describes an angle that measures exactly 180 degrees?

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Study for the MCA Math Vocabulary 4th Grade Test. Prepare with flashcards and multiple choice questions, each question offers hints and explanations. Gear up for your exam!

Multiple Choice

Which term describes an angle that measures exactly 180 degrees?

Explanation:
An angle is the space between two rays that share a common endpoint. When those two rays point in opposite directions to form a straight line, the angle between them measures 180 degrees. That exact measure is called a straight angle. An acute angle is smaller than 90 degrees, so it isn’t 180. An equilateral triangle describes a shape with equal sides, not a single angle, and approximately isn’t a precise term for angle size.

An angle is the space between two rays that share a common endpoint. When those two rays point in opposite directions to form a straight line, the angle between them measures 180 degrees. That exact measure is called a straight angle. An acute angle is smaller than 90 degrees, so it isn’t 180. An equilateral triangle describes a shape with equal sides, not a single angle, and approximately isn’t a precise term for angle size.

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