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Angle Classification

Categories of angles based on measurements and relationships.

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Angle Classification

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    Acute Angle

    An acute angle is an angle with a measure of less than 90 degrees.

    Obtuse angle

    An obtuse angle is an angle greater than 90 degrees but less than 180 degrees.


    Perpendicular lines are lines that intersect at a 90^{\circ} angle. The product of the slopes of two perpendicular lines is -1.

    Right Angle

    A right angle is an angle equal to 90 degrees.

    Straight angle

    A straight angle is a straight line equal to 180^{\circ}.

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