全等三角形测试题
\u5168\u7b49\u4e09\u89d2\u5f62\u6d4b\u8bd5\u98981.
BE=CF\uff0c\u2220BDE=\u2220CDF(\u5bf9\u9876\u89d2)\uff0c\u2220BED=\u2220CFD=90\u00b0
\u4e09\u89d2\u5f62BED\u5168\u7b49\u4e8e\u4e09\u89d2\u5f62CFD(AAS)\uff0c\u6240\u4ee5DE=DF\u3002
\u53c8AD=AD\uff0c\u2220AED=\u2220BFD=90\u00b0
\u6240\u4ee5\u4e09\u89d2\u5f62AED\u5168\u7b49\u4e8e\u4e09\u89d2\u5f62AFD(HL)
\u6240\u4ee5\u2220DAE=\u2220DAF\uff0c\u5373AD\u5e73\u5206\u2220BAC.
2.\u76f8\u7b49
\u8bbeCG\u548cBE\u76f8\u4ea4\u4e8eH\uff0c\u89c2\u5bdf\u4e09\u89d2\u5f62CEH\u548c\u4e09\u89d2\u5f62BFH
\u2220CHE=\u2220BHF(\u5bf9\u9876\u89d2)\uff0c\u2220CEH=\u2220BFH=90\u00b0\uff0c\u6240\u4ee5\u2220ECH=\u2220FBH
\u4e5f\u5373\u2220GCA=\u2220ABD\u3002
\u53c8\u56e0\u4e3aAB=GC\uff0cAC=DB
\u6240\u4ee5\u4e09\u89d2\u5f62GCA\u5168\u7b49\u4e8e\u4e09\u89d2\u5f62ABD(SAS)
\u6240\u4ee5AG=DA
\u4e00\u3001\u586b\u7a7a\u9898(\u6bcf\u98986\u5206\uff0c\u517130\u5206)
1.\u5982\u56fe\uff0c\u25b3ABC\u548c\u25b3DEF\u662f\u5168\u7b49\u4e09\u89d2\u5f62\uff0c\u82e5AB=DE\uff0c\u2220B=50\u00b0\uff0c\u2220C=70\u00b0\uff0c\u2220E=50\u00b0\uff0c\u5219\u2220D\u7684\u5ea6\u6570\u662f_____
2.\u5982\u56fe\uff0c\u25b3ABC\u224c\u25b3BAD\uff0cA\u548cB\uff0cC\u548cD\u662f\u5bf9\u5e94\u9876\u70b9\uff0cAB=6\uff0cBD=5\uff0cAD=4\uff0c\u5219BC=____
3.\u5df2\u77e5\u25b3ABC\u4e2d\uff0c\u2220C=90\u00b0\uff0cAD\u5e73\u5206\u2220A\u4ea4BC\u4e8e\u70b9D\uff0c\u82e5BC=8\uff0cBD=5\uff0c\u5219D\u5230AB\u7684\u8ddd\u79bb\u662f_____\u3002
4.\u5982\u56fe\uff0c\u22201=\u22202\uff0c\u8981\u4f7f\u25b3ABC\u224c\u25b3ADC\uff0c\u8fd8\u9700\u8981\u6dfb\u52a0\u4e00\u4e2a\u6761\u4ef6\u662f____
5.\u5982\u56fe\uff0c\u76f4\u89d2\u4e09\u89d2\u5f62ABC\u5185\uff0c\u70b9O\u5230\u4e09\u89d2\u5f62\u4e09\u8fb9\u7684\u8ddd\u79bb\u76f8\u7b49\uff0c\u5219\u2220AOB=___\u3002
\u4e8c\u3001\u9009\u62e9\u9898(\u6bcf\u98986\u5206\uff0c\u517130\u5206)
6.\u25b3ABC\u4e2d\uff0cD\u3001E\u5206\u522b\u662fAC\uff0cBC\u4e0a\u7684\u70b9\uff0c\u82e5\u25b3ADB\u224c\u25b3EDB\u224c\u25b3EDC\uff0c\u5219\u2220C\u7684\u5ea6\u6570\u662f( )
A.15\u00b0 B.20\u00b0 C.25\u00b0 D.30\u00b0
7.\u5982\u56fe\uff0cAB=A1B1\uff0c\u2220A=\u2220A1\uff0c\u8981\u4f7f\u25b3ABC\u224c\u25b3A1B1C1\uff0c\u8fd8\u9700\u8981( )
A.\u2220B=\u2220B1 B.\u2220C=\u2220C1 C.AC=A1C1 D.\u4ee5\u4e0a\u7b54\u6848\u5747\u53ef
8.\u5982\u56fe\uff0c\u5df2\u77e5\u25b3ABC\u4e2d\uff0cDF=FE\uff0cBD=CE\uff0cAF\u22a5BC\uff0c\u5782\u8db3\u4e3aF\uff0c\u5219\u6b64\u56fe\u4e2d\u5168\u7b49\u4e09\u89d2\u5f62\u5171\u6709( )\u5bf9
A.5\u5bf9 B.4\u5bf9 C.3\u5bf9 D.2\u5bf9
9.\u4e24\u4e2a\u4e09\u89d2\u5f62\u6709\u4e24\u8fb9\u548c\u4e00\u89d2\u5bf9\u5e94\u76f8\u7b49\uff0c\u5219\u4e24\u4e2a\u4e09\u89d2\u5f62( )
A.\u4e00\u5b9a\u5168\u7b49 B.\u4e00\u5b9a\u4e0d\u5168\u7b49 C.\u53ef\u80fd\u5168\u7b49\uff0c\u53ef\u80fd\u4e0d\u5168\u7b49 D.\u4ee5\u4e0a\u90fd\u4e0d\u662f
10.\u5982\u56fe\uff0c\u5df2\u77e5AD\u2016BC\uff0cAD=BC\uff0c\u5219\u4e0b\u5217\u7ed3\u8bba\u6b63\u786e\u7684\u4e2a\u6570\u4e3a( )
(1)AB=CD
(2)\u2220B=\u2220D
(3)\u22201=\u22202
(4)\u2220B+\u2220DCB=180 \u00b0
A.4\u4e2a B.3\u4e2a C.2\u4e2a D.1\u4e2a
\u4e09\u3001\u89e3\u7b54\u9898(\u6bcf\u989810\u5206\uff0c\u517140\u5206)
11.\u5982\u56fe\uff0c\u5df2\u77e5BD=CD\uff0cBF\u22a5AC\uff0cCE\u22a5AB\uff0c\u6c42\u8bc1\uff1aD\u5728\u2220BAC\u7684\u5e73\u5206\u7ebf\u4e0a\u3002
12.\u5982\u56fe\uff0c\u5df2\u77e5\u70b9D\u3001E\u5728BC\u4e0a\uff0cAB=AC\uff0cAH\u22a5BC\u4e8eH\uff0c\u2220DAH=\u2220EAH\uff0c\u6c42\u8bc1\uff1aBD=CE\u3002
13.\u5982\u56fe\uff0cAB=CD\uff0cDE\u22a5AC\uff0cBF\u22a5AC\uff0cE\u3001F\u4e3a\u5782\u8db3\uff0cDE=BF\uff0c\u6c42\u8bc1\uff1aAB\u2016CD
14.\u56db\u8fb9\u5f62ABCD\u4e2d\uff0cAD\u2016BC\uff0c\u82e5\u2220DAB\u7684\u5e73\u5206\u7ebfAE\u4ea4CD\u4e8eE\uff0c\u8fde\u63a5BE\uff0c\u4e14BE\u6070\u597d\u5e73\u5206\u2220ABC\uff0c\u627e\u51faAB\u7684\u957f\u4e0eAD+BC\u7684\u957f\u7684\u5927\u5c0f\u5173\u7cfb\uff0c\u5e76\u8bc1\u660e\u4f60\u7684\u7ed3\u8bba\u3002
15.\u5df2\u77e5\uff1a\u5982\u56fe\uff0c\u25b3ABC\u4e2d\uff0c\u2220ACB=90\u00b0\uff0cAC=BC\uff0cAE\u662fBC\u8fb9\u4e0a\u7684\u4e2d\u7ebf\uff0cCD\u22a5AE\u4e8eF\uff0c\u4e14CD=AE\uff0c
(1)\u82e5\u8fde\u7ed3BD\uff0c\u6c42\u2220DBC\uff1b
(2)\u82e5AC=12cm\uff0c\u6c42BD\u7684\u957f\u3002
16.\u5df2\u77e5\u7b49\u8fb9\u25b3ABC\u4e2d\uff0cD\u3001E\u5206\u522b\u662fAC\u3001BC\u4e0a\u7684\u70b9\uff0cBD\u3001AE\u76f8\u4ea4\u4e8e\u4e00\u70b9N\uff0cBM\u22a5AE\u4e8eM\uff0c\u82e5AD=CE\u3002
(1)\u6c42\u8bc1\uff1a\u25b3ABD\u224c\u25b3AEC
(2)\u6c42\u8bc1\uff1a
第一个SAS
第三个ASA
第四个AAS
第二个不行
把我的回答采为最佳答案！谢了！
选C 1是边角边
2是边边角 不行
3是角边角
4是角角边
A
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绛旓細璇佹槑锛氣埖CE鈯D浜嶦,BF鍨傜洿AD浜D鐨勫欢闀跨嚎浜嶧 鈭粹垹CED=鈭燘FD=90掳 鈭礎D鏄涓夎褰ABC鐨勪腑绾 鈭碆D=CD 鈭靛湪鈻矯ED涓庘柍BFD涓 鈭燙ED=鈭燘FD 鈭燙DE=鈭燘DF BD=CD 鈭粹柍CED鈮屸柍BFD锛圓AS锛夆埓CE=BF 銆愬笇鏈涗綘鑳介噰绾砄(鈭鈭)O~銆
绛旓細璁锯垹A=3X锛屸垹BCA=10X锛屸垹ABC=5X.3X+10X+5X=180掳锛寈=10掳 鈭燗=30掳锛屸垹ACB=100掳锛屸垹ABC=50掳 鈭碘柍ABC鈮屸柍DEC 鈭粹垹D=鈭燗=30掳 鈭碆E=CE 鈭粹垹EBC=鈭燛CB=180掳-鈭燗CB=180掳-100掳=80掳 鈭燚BF=180掳-80掳-50掳=50掳 鈭粹垹DFA=鈭燚+鈭燚BF=30掳+50掳=80掳 ...
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绛旓細闀垮害鐨勬瘮涓2锛3锛2 璁捐竟闀夸负X 閭ｄ箞 2x锛3x锛2x 鎵浠2x+3x+2x=42 鎵浠 x=6 鎵浠ユ渶闀胯竟涓18CM 鎸夎竟鍒嗙被鐨勮瘽 搴旇鏄瓑鑵涓夎褰
