数学中黄金分割线的画法 理工学科 -> 数学 -> 初3 ->
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1 \u6761\u4ef6\u4e0d\u5168\uff0c\u4f46\u662f\u53ea\u80fd\u9009A
\u56e0\u4e3a\u8ddd\u79bb\u4e0d\u53ef\u80fd\u5927\u4e8e\u534a\u5f84
3 D
A\u4e0d\u5bf9\uff0c\u4e24\u6761\u76f4\u5f84\u4e92\u76f8\u5e73\u5206
B\u660e\u663e\u4e0d\u5bf9\uff0c\u5e73\u5206\u4e00\u6761\u5f27\u7684\u76f4\u7ebf\u53ef\u4ee5\u6709\u65e0\u6570\u6761
C\u4e0d\u5bf9\uff0c\u534a\u5f84\u4e0d\u540c\u7684\u65f6\u5019\u4e0d\u540c
4C
5 \uff08a-b\uff09/2\u6216\u8005\uff08a+b\uff09/2\uff08\u70b9\u5728\u56ed\u5185\u7684\u60c5\u51b5\uff09
7D \u5916\u5fc3\u4e3a\u5916\u63a5\u5706\u7684\u5706\u5fc3
10 D\u76f4\u5f84\u6240\u5bf9\u7684\u5706\u5468\u89d2\u4e3a\u76f4\u89d2
1.
设已知线段为AB，过点B作BC⊥AB，且BC=AB/2;
2.
连结AC;
3.
以C为圆心，CB为半径作弧，交AC于D;
4.
以A为圆心，AD为半径作弧，交AB于P，
则点P就是AB的黄金分割点。
来源：三步学交易
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