如图5-17，已知直线AB和直线CD被直线EF所截，交点分别为E，F，角AEF=角EFD。1、直线 如图，已知直线AB和直线CD被直线GH所截，交点分别为E、F...
\u5728\u4e0b\u56fe\u4e2d\uff0c\u5df2\u77e5\u76f4\u7ebfAB\u548c\u76f4\u7ebfCD\u88ab\u76f4\u7ebfGH\u6240\u622a\uff0c\u4ea4\u70b9\u5206\u522b\u4e3aE\u3001F\u70b9\uff0c\u2220AEF=\u2220EFD\uff0e\uff081\uff09\u5199\u51faAB\u2225CD\u7684\u6839\u636e\uff1b\uff08\u89e3\uff1a\uff081\uff09\u2235\u2220AEF=\u2220EFD\uff0c\u2234AB\u2225CD\uff08\u5185\u9519\u89d2\u76f8\u7b49\uff0c\u4e24\u76f4\u7ebf\u5e73\u884c\uff09\uff0e\uff082\uff09EM\u2225FN\uff0c\u8bc1\u660e\uff1a\u2235ME\u662f\u2220AEF\u7684\u5e73\u5206\u7ebf\uff0cFN\u662f\u2220EFD\u7684\u5e73\u5206\u7ebf\uff0c\u2234\u2220MEF= \u2220AEF\uff0c\u2220NFE= \u2220EFD\uff0c\u2235\u2220AEF=\u2220EFD\uff0c\u2234\u2220MEF=\u2220NFE\uff0c\u2234EM\u2225FN\uff08\u5185\u9519\u89d2\u76f8\u7b49\uff0c\u4e24\u76f4\u7ebf\u5e73\u884c\uff09\uff0e
\uff081\uff09EM\u2225FN\uff0c\u7406\u7531\u4e3a\uff1a\u2235ME\u662f\u2220AEF\u7684\u5e73\u5206\u7ebf\uff0cFN\u662f\u2220EFD\u7684\u5e73\u5206\u7ebf\uff0c\u2234\u2220MEF=12\u2220AEF\uff0c\u2220EFN=12\u2220EFD\uff0c\u53c8\u2235AB\u2225CD\uff0c\u2234\u2220AEF=\u2220EFD\uff0c\u2234\u2220MEF=\u2220EFN\uff0c\u2234EM\u2225FN\uff1b\uff082\uff09EK\u22a5FN\uff0c\u7406\u7531\u4e3a\uff1a\u2235AB\u2225CD\uff0c\u2234\u2220BEF+\u2220EFD=180\u00b0\uff0c\u53c8\u2235EK\u662f\u2220BEF\u7684\u5e73\u5206\u7ebf\uff0cFN\u662f\u2220EFD\u7684\u5e73\u5206\u7ebf\uff0c\u2234\u2220FEK=12\u2220BEF\uff0c\u2220EFN=12\u2220EFD\uff0c\u2234\u2220FEK+\u2220EFN=90\u00b0\uff0c\u2234\u2220EKF=90\u00b0\u5373EK\u22a5FN\uff0e
1.平行，因为内错角相等，两直线平行。绛旓細1.骞宠锛屽洜涓哄唴閿欒鐩哥瓑锛屼袱鐩寸嚎骞宠銆
绛旓細鍦ㄥ鍥剧洿瑙掑潗鏍囩郴涓弿鍑轰笅鍒楃偣:A(1,1),B(5,1),C(3,3),D(-3,3),E(1,-2),F(1,4),G(3,2),H(3,-2),I(-1,-1),J(-1,1).杩炵粨AB,CD,EF,GH,IJ,鎵惧嚭瀹冧滑涓偣鐨勫潗鏍.灏嗕笂杩颁腑鐐圭殑妯潗鏍囧拰绾靛潗鏍囧垎鍒笌瀵瑰簲绾挎鐨勪袱涓鐐圭殑妯潗鏍囧拰绾靛潗鏍囪繘琛屾瘮杈,浣犲彂鐜板畠浠箣闂存湁浠涔堝叧绯?鍐欏嚭浣犵殑鍙...
绛旓細瑙ｂ埖鐩寸嚎AB,CD,EF鐩镐氦浜庣偣O鈭粹垹AOB=鈭燙OD=鈭燛OF=180掳涓斺垹AOC涓庘垹BOD鏄椤惰鈭礝G鈯D鈭粹垹DOG=鈭燙OG=鈭燝OA+鈭燗OC=鈭燜OD+鈭燜OG=90掳鈭碘垹BOD=32掳鈭粹垹AOG=90掳-32掳=58掳
绛旓細瑙ｏ細1,鐩寸嚎AB鐨勮В鏋愬紡涓猴細y=(12/5)*x+12 2.鍦▂杞翠笂瀛樺湪涓ょ偣E(0, -1), F(0, 25),浣垮緱E,F,B,C涓洪《鐐圭殑鍥涜竟褰负鐭╁舰 3,鍒嗗埆杩囩偣C,D浣渪杞,y杞寸殑骞宠绾跨浉浜や簬K,寤堕暱KC浜杞翠簬H 鏄撳緱涓夎褰HC鍏ㄧ瓑浜庝笁瑙掑舰CKD 鍥犱负鐐笴(5, 24) 鎵浠H=5, AH=12 鎵浠ワ紝CK=AH=12, KD=CH=...
绛旓細5. 鑻 +|n+1|=0,鍒 鐨勫兼槸( )A.1 B.-1 C.2 D.-26. .7.鍖栫畝姹傚: ,鍏朵腑 .8.瑙ｆ柟绋 9.濡傚浘,宸茬煡C鏄疉B鐨勪腑鐐,D鏄疉C鐨勪腑鐐,E鏄疊C鐨勪腑鐐.¬(1)鑻B=18cm,姹侱E鐨勯暱;(2)鑻E=5cm,姹侱B鐨勯暱.10.濡傚浘,宸茬煡鐩寸嚎AB鍜CD鐩镐氦浜嶰鐐,鈭燙OE鏄洿瑙,OF 骞冲垎鈭燗OE, 鈭燙OF=34掳,姹傗垹BOD鐨...
绛旓細mn=4锛岃В寰梞=1/4锛宯=16鎴栬卪=-4锛宯=-1锛屽垎鍒В寰梱=-16x+20鍜寉=3/5x+5/17 缁间笂鎵璇存湰棰樻湁鍥涗釜绛旀锛寉=-x+5鎴杫=16x-12鎴杫=-16x+20鎴杫=3/5x+5/17 鏄亾寰堢箒鐞愮殑棰橈紝鑰楄垂浜嗘垜涓嶅皯鏃堕棿锛岄棶鑰呭簲璇ヨ拷鍔犲垎鍊200鍚с傛湰浜烘槸鍒濅腑鏁板鑰佸笀锛屼互鍚庢湁浠涔堜笉鎳傜殑灏遍棶鎴戝惂銆
绛旓細5. 濡傚浘锛屽凡鐭ョ洿绾緼B銆丆D鐩镐氦浜庣偣O锛孫E骞冲垎鈭燙OB锛岃嫢鈭燘OD锛70º锛屽垯鈭燛OB鐨勫害鏁版槸锛 锛堿锛35ºB锛55ºC锛70ºD锛110º6. 鐢ㄤ竴鍓笁瑙掓澘鎷艰锛屼笅闈㈢殑瑙掍笉鑳芥嫾鍑虹殑瑙掓槸锛 锛堿锛75掳 B锛135掳 C锛145掳 D锛150掳 7. 鑻 锛 锛 锛屽垯涓嬪垪澶у皬鍏...
绛旓細涓夈佽В绛旈(鍏6閬撳皬棰,姣忓皬棰5鍒,鍏30鍒)13.璁＄畻:.14.瑙ｄ笉绛夊紡缁:15.宸茬煡,姹()(x+2)鐨勫.16.濡傚浘,鈻矨CB鍜屸柍ECD閮芥槸绛夎叞鐩磋涓夎褰,鈭燗CB=鈭燛CD=90掳,D涓AB杈逛笂涓鐐.姹傝瘉: AE=BD.17.濡傚浘,宸茬煡鐩寸嚎缁忚繃鐐瑰拰鐐,鍙︿竴鏉＄洿绾跨粡杩囩偣,涓斾笌杞寸浉浜や簬鐐.姹傜洿绾跨殑瑙ｆ瀽寮;(2)鑻ョ殑闈㈢Н涓3,姹傜殑鍊.18...
绛旓細C锛-2x+4=2/x x²-2x+1=0 (x-1)²=0 x=1 y=2/1=2 C(1,2)璁綧(m,0)kCM=(2-0)/(1-m)=2/(1-m)鈭礐M鈯N 鈭磌CN=(m-1)/2 CN鏂圭▼锛歽-2=(m-1)/2*(x-1)y=2+(m-1)/2*(x-1)N锛歺=0 y=2+(m-1)/2*(0-1)=2+(1-m)/2=(5-m)/2 N(0...
绛旓細銆愯В绛斻戣В:(1)鍘熷紡=ab锕锕+1 =ab锕(a+b)+1 =锕2锕3+1 =锕4 (2)鍘熷紡=(a+b)2锕2ab =9+4 =13 (3)鈭(a锕)2 =a2+b2锕2ab =13+4 =17 鈭碼锕=卤. 銆愮偣璇勩戞湰棰樿冩煡浜嗘暣浣撲唬鍏ュ拰瀹屽叏骞虫柟鍏紡鐨勫彉褰.瑙ｅ喅鏈鐨勫叧閿槸鍒╃敤杞寲鐨勬濇兂. 20.(7鍒)濡傚浘,宸茬煡AB=CD,AE鈯D,CF鈯...
