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证明线段相等的常用方法有:(一)一般方法:1.全等三角形的性质;2.线段的垂直平分线或角平分线的性质;3.等腰三角形的性质或“三线合一”的性质;4.特殊四边形的性质;5.成比例线段;6.圆中垂径定理,或切线长定理,或在同圆(等圆)中,等弧对等弦、弦心距等则弦等、弦等则弦心距等;7.中间量传递;8.计算证明.(二)特殊方法:方程法、面积法、三角函数法、补形法、反证法、同一法.大多数题有多种解法,需要对各种解法进行优化,找出最
Common methods to prove that the line segments are equal are: (a) general methods: 1. the nature of congruent triangles; 2. the nature of the vertical bisector or angle bisector of the line segments; 3. the nature of the isosceles triangle or "; 4. Properties of special quadrilaterals; 5. Proportional line segments; 6. Vertical-diameter theorems in circles, or tangential-length theorems, or equi-arcs in the same circle The string and other strings, chord and other string center distance, etc .; 7 intermediate transmission; 8 proof of calculation (b) special methods: equation method, area method, trigonometric function method, The title has a variety of solutions, you need to optimize a variety of solutions to find the most