Demonstration apparatus for solid geometry

The utility model relates to a teaching tool, especially to a demonstration apparatus for solid geometry. The demonstration apparatus comprises a glass housing; a plurality of groups of mounting holes are distributed in the wall of the glass housing uniformly; and each group includes three mounting holes in a triangular arrangement mode. A fixed ring is sleeved at each mounting hole; four hooks are symmetrically distributed at the outer side wall of the fixed ring; and a light-blocking cover is arranged at the inner side of the fixed ring. Anti-skid teeth are arranged at the inner ring walls of the fixed rings; and the internal diameters of the inner rings are in a small external portion and large internal portion mode. Laser pens are inserted into the fixed rings; control switches of the laser pens are arranged at the tail portions of the laser pens; and hanging rings are arranged at the rods of the laser pens. Compared with the equipment in the prior art, the provided demonstration apparatus has the following characteristics: firstly, the demonstration apparatus can be installed rapidly and only the laser pens are needed to be inserted into the fixed rings and then the tool is fixed; and secondly, the demonstrated three-dimensional graph is clear and bright and the demonstration apparatus is suitable for demonstration in a class room with the large area.