三角形全等证明,十分注重“对应”两个字,只有“对应”了,才能确保那些证明正确无误.一个三角形有3角3边6个元素.两个三角形如果3只角3条边都分别相等了,当然全等.但学贵有疑:这条件太苛刻了,能不能放宽一些呢?6个元素中一个两个分别相等,显然不行,有3个元素或3个以上分别相等, The trigonometric proof proves that it pays great attention to the “correspondence” of the two words. Only “corresponding” can ensure that the proofs are correct. A triangle has 3 corners and 3 sides and 6 elements. Two triangles are separated if there are 3 corners and 3 sides. Equal, of course, all in class. But scholars are skeptical: This condition is too harsh. Can we relax some? One of the six elements is equal, obviously not. There are 3 elements or 3 or more equal.