Which figure is a regular tessellation?

Answer 1

A tessellation in Stained Glass: A nonexistent, without proper placement, newly formed shape from four corners placed together at points of four different stained glass panes which can be near-identically individually created to radically unique except for at strategically planned corners so that a shape can emerge seemingly by magic or mystery when in fact it was painstakingly mapped out in preparatory sketches and stained glass pieces laid in place prior to soldering, and in this way color schemes can be arranged for dramatic and maximum effect once the four corners of the four panes are placed in the larger stained glass project.

Answer 2

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