一:基础知识:
1.棱柱、棱锥定义__________________________________________________
2.棱柱、棱锥几何性质______________________________________________
3.圆柱、圆锥:____________________________________________________
4.棱台、圆台、球体定义:_____________________________________________
5.棱台、圆台几何性质______________________________________________
6. 柱锥台的表面积和体积