# Triangular prism and it's transformation

We get this model from the box; it is in a set separately from all other models. We close all sides. Then we pull A1BA1C, and we obtain a regular triangular prism.

Opening the AB, AC and BC we obtain the truncated pyramid. Further, extending BB1 until the B_{1}A_{1}, A, B_{1}, C_{1}, C become straight lines, we obtain a triangular pyramid ABCB1, where different sections of a triangular pyramid are visible. This model is of interest that the simple turning from side to side generates more and more new pyramids with various sections.

We hold from top B1 and pull in order to obtain a pentagonal pyramid. All other sides are B_{1}A, B_{1}B, B_{1}C_{1}, B_{1}C_{1} and B_{1}A_{1}.

We increase the sides of the quadrangle ABCA_{1}, turning it into quadrate. We compress the C_{1}B_{1} till the end and move upwards and inwards the top C_{1} and bring it up to the osculation with CA. As a result we obtain a tetragonal pyramid with the height B_{1}C_{1}. For receiving a pentagonal pyramid again we close all sides.

The triangular prism turns into the regular hexagon, and you can obtain it yourself

To obtain an octahedron from this model (regular octahedron), we do the following. Strongly holding from the top C and twisting CA_{1} midstream completely separating from the top C. In the same way we separate CA_{1} from A_{1}. Then CA_{1} is strengthened in tops A and C1. Closing all sides, we obtain an octahedron.