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对于形如“a=b+c”的线段等式的证明,通常有以下思路:1.直接证(线段转换):通过全等三角形或等角对等边进行证明例1 如图1,已知△ABC和△BED都是等边三角形,且A、E、D在一条直线上,求证:
For the proof of the line segment equation with the form “a=b+c”, there are usually the following ideas: 1. Direct authentication (line segment conversion): Prove through equal congruent triangles or equiangular peers Example 1 As shown in Figure 1, Know that △ABC and △BED are equilateral triangles, and A, E, D in a straight line, verify: