ACUTE ANGLE, OBTUSE ANGLE, , RIGHT ANGLE, , REFLEX ANGLE, , STARIGHT ANGLE, , PROTRACTOR, TO MEASURE ANGLES, INTERIOR POINTS, POINTS INSIDE THE ANGLES FORMED, EXTERIOR POINTS, POINTSOUTSIDE THE ANGLES FORMED, ZERO ANGLE, , COMPLETE ANGLE, ONE COMPLETE ROTATION OF A JAINT WHEEEL.

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