golden monkey teaching ruler set square compasses magnetic ruler set square protractor set mathematics teaching aids 金丝猴教学用尺三角尺圆规磁性直尺三角尺量角器套装数学教学用具

chalk compasses (can clip chalk) multi-purpose compasses (can clip chalk, whiteboard marker) [non-magnetic] 1 m ruler (fixed handle) [non-magnetic] 1 m ruler (removable handle) [non-magnetic] 50cm protractor [non-magnetic] 50cm pointer protractor [non-magnetic] 45 degrees set square [non-magnetic] 60 degrees set square [non-magnetic] set square 60/45 suit [non-magnetic] chalk compasses + triangle ruler set + protractor = 4-piece set [non-magnetic] chalk compasses + triangle ruler set + protractor + ruler = 5-piece set [magnetic] 1 m ruler (fixed handle) [magnetic] 50cm protractor [magnetic] 50cm pointer protractor [magnetic] 45 degrees set square [magnetic] 60 degrees set square [magnetic] set square 60/45 [magnetic] multi-purpose compasses + triangle ruler set + protractor = 4-piece set [magnetic] multi-purpose compasses + triangle ruler set + protractor + ruler = 5-piece set

teaching ruler