TY - JOUR AU - M. Stupel TI - A Triangle "Broken" into Four Triangles -- the Special Status of the Central Triangle JO - Journal for geometry and graphics PY - 2018 SP - 253 EP - 256 VL - 22 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/JGG_2018_22_2_JGG_2018_22_2_a8/ ID - JGG_2018_22_2_JGG_2018_22_2_a8 ER -