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1.遇角分类例1 (1)等腰三角形的一个角是30°,求底角.(2)等腰三角形的一个角是100°,求底角.分析等腰三角形的一个角可能是底角,也可能是顶角,须分情况讨论,注意:顶角可以
1. Example of incident angle classification 1 (1) One corner of an isosceles triangle is 30°, and the base angle is found. (2) One corner of an isosceles triangle is 100°. Finding the base angle. An angle of an isosceles triangle may be The bottom corner may also be the top corner. It must be discussed in detail. Note: The top corner can be