一、教学地位和作用全等三角形是最简单的全等图形,在生活中处处可见.在知识结构上,线段相等、平行、垂直,角相等、平分,等腰三角形、直角三角形、线段的垂直平分线、角平分线等内容都可以通过证明两个三角形全等来加以解决,在研究对称图形、四边形和其他图形的性质及解决实际 First, the teaching status and role of the congruent triangle is the most simple congruent graphics, can be seen everywhere in life. In the knowledge structure, the line segments are equal, parallel, vertical, equal angles, equally divided, isosceles triangles, right triangles, line segments vertical The bisectors, bisectors, etc. can be solved by proving that the two triangles are congruent, and the nature of symmetric graphs, quadrilaterals, and other graphs is being studied and solved.