OA,AO的延长线的区别
\u5c04\u7ebfOA\u4e0e\u5c04\u7ebfAO\u76f8\u540c\u5417?\u533a\u522b\u5728\u54ea\u91cc?\u4e0d\u540c
\u524d\u8005\u662f\u4ee5O\u4e3a\u9876\u70b9\uff0c\u5f80\u53f3
\u540e\u8005\u4ee5A\u4e3a\u9876\u70b9\uff0c\u5f80\u5de6
\u56e0\u4e3aOB=OQ \u6240\u4ee5\u2220OBQ\uff1d\u2220OQB
\u2220OBQ + \u2220BPO\uff1d90\u5ea6 \u2220OQB + \u2220RQP\uff1d90\u5ea6
\u6240\u4ee5\u2220BPO\uff1d\u2220RQP \u2220RQP \uff1d \u2220RPQ
\u6240\u4ee5RP=PQ
绛旓細瑙ｏ細浣AO鐨勫欢闀跨嚎锛浜ゅ渾浜庣偣E锛孋D=AC-AD 1. 鍥犱负鐐笰OD閮藉湪鍚屼竴涓渾涓婏紝涓擜E鏄洿寰 鎵浠ヨADE=90搴︼紝鈻矨DE鏄洿瑙掍笁瑙掑舰 鍥犱负OA鈯B锛孊C涓篛B鐨勫欢闀跨嚎 鎵浠モ柍AOC鏄洿瑙掍笁瑙掑舰锛岃AOC绛変簬90搴 2. 鈻矨DE鏄洿瑙掍笁瑙掑舰锛屸柍AOC鏄洿瑙掍笁瑙掑舰锛岃A鍦ㄢ柍ADE涓紝涔熷湪鈻矨OC涓紝鎵浠 鈻矨DE鐩镐技涓庘柍...
绛旓細1銆佸鍥,鐐筄鏄嚎娈礎D鐨勪腑鐐,鍒嗗埆浠O鍜孌O涓鸿竟,鍦ㄧ嚎娈礎D鐨勫悓渚у仛绛夎竟涓夎褰AB鍜屼笁瑙掑舰OCD,杩炴帴AC鍜孊D浜や簬E,杩炴帴BC,姹傝AEB鐨勫ぇ灏忋(2)鑻涓嶆槸AD鐨勪腑鐐,鍏朵粬鏉′欢涓嶅彉,闂剼AEB鐨勫ぇ灏忔槸鍚﹀彉鍖栧苟璇存槑鐞嗙敱銆 2銆 宸茬煡,AO鏄柍ABC鐨勪腑绾,寤堕暱AO鍒癊,浣縊E=AO,D鍦˙C鐨勫欢闀跨嚎涓,CD=AB,鈭燘AC=鈭燗CB銆傛眰璇:...
绛旓細瑙ｏ細鈭礏C鏄姍O鐨勫垏绾匡紝OB鏄姍O鐨勫崐寰勶紝鈭粹垹OBC=90掳锛屸埖OA=OB锛屸埓鈭燗=鈭燗BO=20掳锛屸埓鈭燘OC=40掳锛屸埓鈭燙=50掳锛庢晠閫塀锛
绛旓細濡傚浘,鍦ㄢ柍OAB涓,鐐筆鐢辩嚎娈礝B鍙夾B/AO鐨勫欢闀跨嚎鍥存垚鐨勯槾褰卞尯鍩熷唴鐨勪换鎰忎竴鐐,涓斿悜閲廜P=x鍚戦噺OA+y鍚戦噺OB,鍦ㄧ洿瑙掑潗鏍囧钩闈笂,姹傚疄鏁板(x,y)婊¤冻鐨勭害鏉熸潯浠躲傛眰璇﹁В,瑕佹楠ゃ傝阿璋... 濡傚浘,鍦ㄢ柍OAB涓,鐐筆鐢辩嚎娈礝B鍙夾B/AO鐨勫欢闀跨嚎鍥存垚鐨勯槾褰卞尯鍩熷唴鐨勪换鎰忎竴鐐,涓斿悜閲廜P=x鍚戦噺OA+y鍚戦噺OB,鍦ㄧ洿瑙掑潗鏍囧钩闈笂,姹傚疄...
绛旓細鈭5/x锛濓紙5锛2DO锛/DO锛屸埓5DO锛5x锛2xDO锛屸埓锛5锛2x锛塂O锛5x锛屸埓DO锛5x/锛5锛2x锛夛紝鈭碆D锛滲O锛岲O锛5锛5x/锛5锛2x锛夛紳锛25锛10x锛5x锛/锛5锛2x锛夛紳锛25锛5x锛/锛5锛2x锛夛紝鈭磞锛漁D/DB锛濓蓟5x/锛5锛2x锛夛冀/锛伙紙25锛5x锛/锛5锛2x锛夛冀锛漻/锛5锛媥锛夈傗埖P鍦AO鐨勫欢闀跨嚎涓婏紝...
绛旓細鍦ㄨ緭鍏ユ捣鍏冲晢鍝佺紪鐮佹煡璇㈡椂锛屾捣鍏崇洃绠℃潯浠堕噷甯镐細瑙佸埌AO鎴朞A杩欐牱鐨勬爣璁帮紝鍏朵腑锛孫鏄嚜鍔ㄨ繘鍙ｈ鍙彲璇侊紝A鏄繘鍙ｅ晢妫閫氬叧鍗曪紝濡傜洃绠℃潯浠舵爮閲屾樉绀篈O鎴OA锛閭ｈ鏄庯紝璇ヨ揣鐗╃殑杩涘彛鎶ュ叧鏃讹紝瀵硅繘鍙ｆ湁闄愬埗锛屽嚭鍙ｆ病鏈夐檺鍒朵簡銆傛墍浠ユ樉绀篛A鍜孉O娌℃湁浠涔鍖哄埆銆
绛旓細浣滄鍗佷簩杈瑰舰鍏堝崄浜岀瓑鍒嗗渾锛屾寜瑕佹眰鍗婂緞锛堟棤鎸囧畾鍗虫槸浠绘剰锛夊厛浣滀竴鍦嗭紝杩囧渾蹇冧綔涓ゆ潯浜掔浉鍨傜洿鐨勭洿寰勫嵆鍥涚瓑鍒嗗渾锛岀劧鍚庡垎鍒互鍥涚瓑鍒嗙偣涓哄渾蹇冿紝鍚屽渾鐨勫崐寰勪负鍗婂緞浣滃姬浜ゅ渾涓庡洓绛夊垎鐐逛竴鍏辨槸鍗佷簩鍒嗙偣锛屼緷娆¤繛缁撳嵆鏄鍗佷簩杈瑰舰銆
绛旓細涓閬撶浉浼肩殑棰樸傚凡鐭ョ嚎娈礝A鈯B,C涓篛B涓婁腑鐐,D涓AO涓婁竴鐐,杩濧C銆丅D浜や簬P鐐 (1)濡傚浘1,褰揙A=OB涓擠涓篈O涓偣鏃,姹侫P/PC鐨勫; (2)濡傚浘2,褰揙A=OB,AD/AO=1/4鏃,姹傗柍BPC涓庘柍ACO鐨勯潰绉箣姣. (3)濡傚浘3,褰揙A=OB,D涓OA寤堕暱绾涓婁竴鐐规椂,AD/AO=1/5,姹侫P/PC鐨勫笺 灞曞紑 1...
绛旓細C -OA=OB+OC锛屽洜姝AO鐨勫欢闀跨嚎鏄互OB銆丱C涓鸿竟鐨勫钩琛屽洓杈瑰舰鐨勪竴鏉″瑙掔嚎锛屾墍浠O鐨勫欢闀跨嚎璇勫垎BC銆傚悓鐞嗗彲鐭O銆丆O涔熸槸涓嚎鐨勪竴閮ㄥ垎銆傛晠O涓洪噸蹇冦
绛旓細鑰冪偣锛 鐩寸嚎銆佸皠绾裤佺嚎娈 涓撻锛 鍒嗘瀽锛 鏍规嵁灏勭嚎銆佺嚎娈点佺洿绾跨殑瀹氫箟瀵瑰悇閫夐」鍒嗘瀽鍒ゆ柇鍒╃敤鎺掗櫎娉曟眰瑙ｏ紟 A銆佸皠绾夸笉鑳寤堕暱锛鎵浠锛屽欢闀灏勭嚎OA鍒扮偣B閿欒锛屾晠鏈夐」閿欒锛汢銆佺嚎娈礎B涓虹洿绾緼B鐨勪竴閮ㄥ垎姝ｇ‘锛屾晠鏈夐」姝ｇ‘锛汣銆佺洿绾挎病鏈夐暱搴︼紝鎵浠ョ敾涓鏉＄洿绾匡紝浣垮畠鐨勯暱搴︿负3cm閿欒锛屾晠鏈夐」閿欒...
