California Assessment of Student Performance and Progress (CAASPP) Math Practice Exam

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How many degrees are in a complete circle?

The correct answer is: 360

A complete circle encompasses a total of 360 degrees. This value is derived from the way circles are defined in geometry, where the full rotation around a point is divided into 360 equal parts. Each of these segments represents one degree. This measurement is widely adopted in various fields including mathematics, navigation, and science, making it a fundamental concept. The other values listed are significant in their own right but pertain to different aspects. For instance, 180 degrees corresponds to a semicircle, marking half the rotation around a point. Meanwhile, 90 degrees indicates a quarter of a circle, often used to define right angles. Lastly, 270 degrees represents three-quarters of a circle, which is also meaningful but does not encompass the entire rotation. Therefore, when identifying how many degrees are in a complete circle, 360 is the only accurate answer.