Chi for mathematical education

The utility model relates to a chi for mathematical education, including main scale, vice chi, bevel protractor and connection chi, the groove of slideing of competent direction is opened to the main scale, slides groove one end and is provided with vice chi, the other end is provided with the bevel protractor slides that even opening there is multiunit fixed orifices no. 1 on the groove, and vice chi one end is provided with the slider, and the other end is seted up flutedly, and the inslot is being slideed in the slider setting, and vice chi both ends are provided with lug no. 1 and lug no. 2 respectively, and lug no. 1 sets up and is in in the recess and with the recess is articulated, and lug no. 2 is gone up to open has fixed orifices no. 2, and the width of lug no. 2 is less than the width that slides the groove, and fixed orifices no. 2 and fixed orifices are one corresponding, the utility model discloses convenient operation, convenient to carry and the accuracy height of mapping.