正确理解和掌握概念是学习数学的基础．概念不清,思维就容易陷入混乱,导致判断、推理或理解错误．特别是在几何学习中,分清一些易混的几何概念,对进一步学好几何具有十分重要的意义．本文仅对相交线中的“同位角、内错角与同旁内角”这组易混概念进行辨别,帮助你提高学习的针对性和实效性． Understanding and mastering concepts correctly is the foundation for learning mathematics. If the concept is not clear, thinking can easily fall into chaos, leading to judgment, reasoning, or understanding errors. Especially in geometry learning, distinguishing some miscible geometric concepts is of great significance for further studying geometry. This article only identifies the miscible concepts of “isotactic angle, internal misalignment angle and same side internal angle” in the intersecting line to help you improve the pertinence and effectiveness of learning.