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An angle that opens up to form a straight line is called a straight angle. Angle D is a straight angle made by two rays coming out of point D in opposite directions.
Angles that turn beyond a straight angle (but not all the way around a full circle) are called reflex angles.
- Mrs. Dewey's class used Angle Circles to make angles. For each angle circle, decide which angle, the white angle or the shaded angle, has more turning.
