Two triangles, one inside the other 26.3.2

两个三角形，一个套在另一个内

Chinese 两个三角形，一个套在另一个内

English Two triangles, one inside the other

Spanish Dos triángulos, uno dentro del otro

Code: 26.3.2
Category: 26.3 Triangles, lines forming an angle
Version: Vienna Classification, 10th edition (VCL 10, in force from 1 Jan 2026); English from the WIPO official text, Chinese is a J&C reference translation