Mathematical compass for geometry for teachers - this plastic is made of, which boasts high durability, not easily deformed, demonstration compass Geometry demonstration compass - adjustable size and design, you can freely choose the radius for, compass for science lessons Compass geometry tool for whiteboard - this compass is a useful aid for teaching mathematics and an auxiliary drawing tool, a large circle compass tool Circle drawing - it can work well with chalk and markers, perfect for drawing a circle or an arc of a circle, large compass for teachers Mathematical compass tool - features a suction cup design, which ensures that the compass and the center of the circle can be firmly fixed to the center of the circle, compass teaching