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Math teachers often need to draw a 30 degrees, 45 degrees, or other angle of the line in the teaching process. It is troublesome to do it with the traditional teaching ruler. This design can help you draw these lines simply by just rotating it and you will find the line of whatever the angle you want. Teaching will be more efficient in the class.
Huazhong University of Science & Technology
Yunyuan #15 Room 129
Wuhan, China
Peng Wu,
Huazhong University of Science & Technology
Xiaofeng Sun,
Huazhong University of Science & Technology
Jiannan Zhang,
Huazhong University of Science & Technology
Xiaoyue Yu,
Huazhong University of Science & Technology
