Identify triangles with three letters (ex., say "triangle ABC" or "tri ABC" or simply "ABC").

用三个字母来描述一个三角形(如说三角形abc或tri ABC或简单地说abc)。

youdao

Identify triangles with three letters (ex., say "triangle ABC" or "tri ABC" or simply "ABC").

用三个字母来描述一个三角形(如说三角形abc或tri ABC或简单地说abc)。

youdao