求证等腰三角形腰上的高与底边的夹角等于顶角的一半. 已知如图所示在 abc中ab=acbd⊥ac.求证∠dbc=∠a. 题目和参考答案 Template




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tomski求证等腰三角形腰上的高与底边的夹角等于顶角的一半. 已知如图所示在 abc中ab=acbd⊥ac.求证∠dbc=∠a. coloring