名词

1. 三角(形);三角形物体
A triangle is an object, arrangement, or flat shape with three straight sides and three angles.

2. 三角铁(一种打击乐器)
The triangle is a musical instrument that consists of a piece of metal shaped like a triangle. You play it by hitting it with a short metal bar.

3. 三角关系
If you describe a group of three people as a triangle, you mean that they are all connected with each other in a particular situation, but often have different interests.

1. a percussion instrument consisting of a metal bar bent in the shape of an open triangle

2. any of various triangular drafting instruments used to draw straight lines at specified angles

3. a three-sided polygon

Synonym: trigontrilateral

4. something approximating the shape of a triangle

e.g. the coastline of Chile and Argentina and Brazil forms two legs of a triangle