What are acute, obtuse, right, and straight angles

The video tutorial explains how to classify angles into four types: straight, right, acute, and obtuse. It begins by defining an angle as formed by two rays with a common endpoint. A straight angle is 180 degrees, forming a line, while a right angle is exactly 90 degrees. Acute angles are less than 90 degrees, and obtuse angles are greater than 90 but less than 180 degrees. The tutorial emphasizes the importance of understanding these classifications for geometric analysis.

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