Equilateral Pentagon That Tiles The Plane
With Two Non-consecutive Complementary to 180° Angles
A+C = 180° & 2C+D = 360°
I obtained this pentagon from the type 6 of the general list of pentagons that tile the plane. If we want an equilateral pentagon, the result can be only a concave pentagon.
Attention: this tiling topology seems to an other, but it is different! :o)