Some models constructed from the Egg of Columbus 'tangram' puzzle, drawn by CMG Lee. The rightmost two models on the top row requires flipping over one of the cyan pieces. The bottom row requires the white triangle to be split into two darker grey triangles.
<a href="//commons.wikimedia.org/wiki/User:Cmglee" title="User:Cmglee">Cmglee</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>