一把没有刻度的直尺和一个圆规把一个任意大小的角度平分.
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\u5728\u4e0e\u5706O\u7684\u76f4\u5f84AB\u5782\u76f4\u7684\u534a\u5f84OC\u4e0a\uff0c\u4f5c\u51faOC\u7684\u4e2d\u70b9D\uff0c\u5728OB\u4e0a\u4f5c\u4e00\u70b9E\uff0c\u4f7fOE\u7b49\u4e8e\u534a\u5f84\u76841/8\uff1b\u4ee5E\u4e3a\u5706\u5fc3\uff0cED\u957f\u4e3a\u534a\u5f84\u4f5c\u5f27\uff0c\u4e0eOA\u3001OB\u5206\u522b\u4ea4\u4e8eF\u3001G\uff1b\u4ee5F\u4e3a\u5706\u5fc3\uff0cFD\u957f\u4e3a\u534a\u5f84\u4f5c\u5f27\uff0c\u4ea4OA\u5ef6\u957f\u7ebf\u4e8eH\uff0c\u4ee5G\u4e3a\u5706\u5fc3\uff0cGD\u957f\u4e3a\u534a\u5f84\u4f5c\u5f27\uff0c\u4ea4OA\u4e8eI\uff1b\u4f5cOB\u4e2d\u70b9J\uff0c\u4ee5\u7ebf\u6bb5IJ\u4e3a\u76f4\u5f84\u4f5c\u5706\uff0c\u4ea4OC\u4e8eK\uff1b\u8fc7K\u4f5cAB\u7684\u5e73\u884c\u7ebf\uff0c\u4e0e\u4ee5\u7ebf\u6bb5OH\u4e3a\u76f4\u5f84\u7684\u5706\u4ea4\u4e8e\u8fdc\u7aefL\uff0c\u8fc7L\u4f5cOC\u7684\u5e73\u884c\u7ebf\uff0c\u4e0e\u5706O\u4ea4\u4e8eM\u3002\u5f27AM\u5c31\u662f\u5706O\u76841/17\u3002
\u4f9d\u6b21\u8fde\u7ed3\u5404\u70b9\u5c31\u884c\u4e86
先在脚的两边截一段距离顶点O相等的线段，设交于点A，B。
再以相等的半径画弧！~交于一点C。连接OC
OC就是角平分线！~
绛旓細浠鍦嗚灏栧ご椤朵綇瑙掔殑椤剁偣锛岀敤鍦嗚閾呭湪涓ゆ潯澶硅杈逛笂鐢讳袱寮э紝鍐嶄互涓ゅ姬涓庡す瑙掕竟鐨勪氦鐐逛负椤剁偣鍒嗗埆鐢诲姬锛屽皢瑙掔殑椤剁偣涓庝袱寮т氦鐐瑰仛杩炵嚎
绛旓細1.鍏堢敤鐩村昂灏嗗渾鍥涚瓑鍒, 2.鐢鍦嗚鍦ㄥ渾杈逛笂浠ュ崐寰勪负鍦嗗績,A涓洪《鐐硅姳鍦,浜ゅ渾浜嶣鐐. 3.杩炴帴鐐笰銆丅锛汢銆丆.鍒欒CAB=60,瑙払CA=30. 4.浠鍦嗗績,OC涓哄崐寰勭敾鍦嗕氦CB浜嶥,浠D闀垮幓绛夊垎鍦嗗嵆鍙.
绛旓細1.鍏堢敤鐩村昂灏嗗渾鍥涚瓑鍒,2.鐢鍦嗚鍦ㄥ渾杈逛笂浠ュ崐寰勪负鍦嗗績,A涓洪《鐐圭敾鍦,浜ゅ渾浜嶣鐐.3.杩炴帴鐐笰銆丅锛汢銆丆.鍒欒CAB=60,瑙払CA=30.4.浠鍦嗗績,OC涓哄崐寰勭敾鍦嗕氦CB浜嶥,浠D闀垮幓绛夊垎鍦嗗嵆鍙.
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