California Assessment of Student Performance and Progress (CAASPP) Math Practice Exam 2025 - Free CAASPP Math Practice Questions and Study Guide

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Which angle measures exactly 90 degrees?

Obtuse angle

Acute angle

Right angle

A right angle is defined as an angle that measures exactly 90 degrees. This is a fundamental concept in geometry, where angles are classified based on their measures. A right angle is critical in various applications, such as construction and design, as it represents the point of perpendicularity, where two lines intersect at a perfect square corner.

Obtuse angles measure more than 90 degrees but less than 180 degrees, making them larger than a right angle. Acute angles, on the other hand, measure less than 90 degrees. Straight angles are exactly 180 degrees, representing a straight line. Understanding these distinctions helps clarify why a right angle, measuring precisely 90 degrees, stands out as the correct answer.

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Straight angle

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