chordal triangle

例句：

1. 1.The chordal triangle is a tool used in music theory to analyze the relationships between notes.
   和弦三角形是音乐理论中用于分析音符之间关系的工具。
2. 2. In music, the chordal triangle is an important concept that helps musicians understand and create harmonious melodies.
   在音乐中，和弦三角形是一个重要概念，帮助音乐家理解和创造和谐的旋律。
3. 3. The chordal triangle is also used in graphic design to help designers create visually appealing compositions.
   和弦三角形也在平面设计中使用，帮助设计师创建视觉上吸引人的作品。