初中阶段学习的基本平面图形主要包含特殊三角形(等腰三角形、直角三角形、全等三角形、相似三角形)、平行四边行(矩形、菱形、正方形)以及圆等.因此,在解决初中平面几何问题时,常需要灵活运用这些基本图形的判定与性质.对于复杂的几何问题,我们可以从这些基本平面图形出发,进行图形的分离、从而突破问题的难点. The basic plane graphics for junior high school mainly include special triangles (isosceles triangles, right triangles, congruent triangles, similar triangles), parallel four sides (rectangles, diamonds, squares), circles, etc. Therefore, , Often need to make flexible use of the judgment and nature of these basic graphics.For complex geometric problems, we can start from these basic graphic graphics, the separation of graphics, so as to overcome the difficulties of the problem.