REGULAR TRIANGULAR PYRAMID AND REGULAR RECTANGULAR PYRAMID COMBINED SOLID FIGURE

摘要

A regular triangular pyramid and regular rectangular pyramid combined solid figure is obtained by means of insertion and combination of six identical parts, and each part is folded by using a piece of rectangular paper with the proportion of length to width being 2:1. The six parts are inserted with each other to form a regular triangular pyramid and regular rectangular pyramid combined solid figure containing four regular triangular pyramids and six regular rectangular pyramids. The folding is regular and reasonable, the combination and insertion are easy, the operation is easy and convenient, and the shape is distinct and attractive.