And then when you have all three sides different length, we call this a " scalene" , " scalene" triangle.
然后,当三个边的长度都不同时, 我们称其为“不等角线” 、“不等角线” 三角形。
英语百科
Triangle
A triangle is a polygon with three edges and three vertices. It is one of the basic shapes in geometry. A triangle with vertices A, B, and C is denoted .
In Euclidean geometry any three points, when non-collinear, determine a unique triangle and a unique plane (i.e. a two-dimensional Euclidean space). This article is about triangles in Euclidean geometry except where otherwise noted.