90° rotational symmetry.
Created from an ordinary triangle (isohedral type IH84 from the book Tilings and Patterns by Branko Grünbaum and Geoffrey Colin Shephard).
25 July 2021
This drawing is available on Wikimedia Commons with a free license CC BY-SA 4.0 (Attribution-ShareAlike 4.0 International) - © Basile Morin
My ambigrams on Wikimedia Commons
are available with a free license CC BY-SA 4.0 (Attribution-ShareAlike 4.0 International).
Take a look also at my paintings on canvas.
© Basile Morin | contact : basile.morin@gmail.com