Then there's a third street that goes in the back, so you have basically a triangular space.
然后是后面的第三条街，所以基本上是一个三角形空间。
Triangular space
原声例句
2015 English Cafe
英语百科
Triangular space
The triangular space (also known as the medial triangular space, upper triangular space, or medial axillary space or foramen omotricipitale) is an axillary space.
It should not be confused with the triangular interval.