A sturdy, flexible 5-1/4" plastic 360º protractor that helps students clearly visualize angles, draw angles, and measure angles accurately. Retains angle measurement when moved. Helps students clearly visualize different kinds of angles, understand an angle is a piece of the 360º circle, draw angles, and measure angles accurately. An outstanding tool for visual learners. AngleViewer™ eliminates the need for the old protractor and can be used on an overhead projector for classroom demonstration. Angles are now accessible to students of all learning styles and levels. Sold as a pack of 3 AngleViewers.