有谁知道难一点的勾股定理数学题？最好初二的 初二勾股定理练习题及答案
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24\uff0e\u8bbe2+\u7684\u6574\u6570\u90e8\u5206\u548c\u5c0f\u6570\u90e8\u5206\u5206\u522b\u662fx\u3001y\uff0c\u8bd5\u6c42x\u3001y\u7684\u503c\u4e0ex\ufe631\u7684\u7b97\u672f\u5e73\u65b9\u6839\uff0e
25\uff0e\u5c06\u4e00\u4e2a\u4f53\u79ef\u4e3a216cm3\u7684\u6b63\u65b9\u4f53\u5206\u6210\u7b49\u5927\u76848\u4e2a\u5c0f\u6b63\u65b9\u4f53\uff0c\u6c42\u6bcf\u4e2a\u5c0f\u6b63\u65b9\u4f53\u7684\u8868\u9762\u79ef\uff0e
26\uff0e\u5982\u56fe\uff0c\u4e00\u4e2a\u957f\u4e3a5m\u7684\u68af\u5b50\u659c\u9760\u5728\u5899\u4e0a\uff0c\u68af\u5b50\u7684\u5e95\u7aef\u8ddd\u58994m\uff0e
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27\uff0e\u5728\u4e00\u5e73\u76f4\u6cb3\u5cb8l\u7684\u540c\u4fa7\u6709A\uff0cB\u4e24\u4e2a\u6751\u5e84\uff0cA\uff0cB\u5230l\u7684\u8ddd\u79bbAM\uff0cBN\u5206\u522b\u662f3km\uff0c2km\uff0c\u4e14MN\u4e3a3km\uff0e\u73b0\u8ba1\u5212\u5728\u6cb3\u5cb8\u4e0a\u5efa\u4e00\u62bd\u6c34\u7ad9P\uff0c\u7528\u8f93\u6c34\u7ba1\u5411\u4e24\u4e2a\u6751\u5e84A\uff0cB\u4f9b\u6c34\uff0c\u6c42\u6c34\u7ba1\u957f\u5ea6\u6700\u5c11\u4e3a\u591a\u5c11\uff0e\uff08\u7cbe\u786e\u52300.1km)
23\uff0e\u6c42\u4e0b\u5217\u5404\u5f0f\u4e2dx\u7684\u503c\uff0e
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\u5219EC===3\uff08m\uff09\uff0e
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AC===4\uff08m\uff09\uff0c
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\uff083\uff09\u82e5AC=4.8m\uff0c\u5219BC===1.4\uff08m\uff09\uff0c
\u5e94\u5c06\u68af\u5b50\u518d\u5411\u5899\u63a8\u8fdb3\ufe631.4=1.6\uff08m\uff09\uff0e
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27\uff0e\u5728\u4e00\u5e73\u76f4\u6cb3\u5cb8l\u7684\u540c\u4fa7\u6709A\uff0cB\u4e24\u4e2a\u6751\u5e84\uff0cA\uff0cB\u5230l\u7684\u8ddd\u79bbAM\uff0cBN\u5206\u522b\u662f3km\uff0c2km\uff0c\u4e14MN\u4e3a3km\uff0e\u73b0\u8ba1\u5212\u5728\u6cb3\u5cb8\u4e0a\u5efa\u4e00\u62bd\u6c34\u7ad9P\uff0c\u7528\u8f93\u6c34\u7ba1\u5411\u4e24\u4e2a\u6751\u5e84A\uff0cB\u4f9b\u6c34\uff0c\u6c42\u6c34\u7ba1\u957f\u5ea6\u6700\u5c11\u4e3a\u591a\u5c11\uff0e\uff08\u7cbe\u786e\u52300.1km\uff09
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\u2235AM\u22a5l\uff0c
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\u2234\u56db\u8fb9\u5f62MA\u2032CN\u662f\u77e9\u5f62\uff0c
\u2234CN=A\u2032M=3km\uff0cA\u2032C=MN=3km\uff0c
\u2234BC=3+2=5km\uff0c
\u2234AP+BP=A\u2032P+PB=A\u2032B=\u22485.8km\uff0e
\u7b54\uff1a\u6c34\u7ba1\u957f\u5ea6\u6700\u5c11\u4e3a5.8km\uff0e
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\u8bc1\u660e\u4e09\u89d2\u5f62AEP\u5168\u7b49\u4e8e\u4e09\u89d2\u5f62BDP
\u6240\u4ee5\u89d2A=\u89d2PBD,AE=BD
\u56e0\u4e3a\u89d2A\u52a0\u89d2B=90^ \u6240\u4ee5\u89d2PBD\u52a0\u89d2B=90^
\u5373\u89d2FBD=90^ \u6240\u4ee5\u4e09\u89d2\u5f62PBD\u662fRt\u4e09\u89d2\u5f62
PB^+BD^=FD^
\u56e0\u4e3aEP=DP \u89d2EPF=90^\u6240\u4ee5EF=FD
\u6240\u4ee5AE^+FB^=EF^
10．（1998•绍兴）如图，在△ABC中，∠A=90°，P是BC上一点，且DB=DC，过BC上一点P，作PE⊥AB于E，PF⊥DC于F，已知：AD：DB=1：3，BC=4 6
，则PE+PF的长是（ ）
13如图点P是凸四边形ABCD内一点过P点分别作AB、BC、CD、AD的垂线垂足分别为E、F、G、H已知AH=3HD=4DG=1GC=5CF=6FB=4且BE-AE=1。求四边形ABCD的周长。
我们都是老师出思考题诶- - 或者你自己买八年级的奥数题做做。
绛旓細1.A锛孊涓や釜灏忛晣鍦ㄦ渤宀窩D鍚屼晶锛屽埌娌冲哺鐨勫瀭鐩磋窛绂诲垎鍒负AC=10锛孊D=30鍗冪背锛屼笖CD=30鍗冪背銆傚厛瑕佸缓涓鑷潵姘村巶锛屽悜AB涓ゅ湴渚涙按锛岄摵璁炬按绠¤垂鐢ㄤ负涓鍗冪背3涓囧厓銆傝鍦ㄦ渤宀窩D涓婃壘鍑烘按鍘侻浣嶇疆锛屽苟浣块摵姘寸璐规渶灏戙傛眰鍑烘昏垂2.M涓虹瓑杈逛笁瑙掑舰ABC涓殑浠绘剰涓鐐锛岃繛鎺A锛孧B锛孧C銆 宸茬煡MA锛4锛 MB锛2鈭3锛孧C...
绛旓細鈭垫牴鎹鍕捐偂瀹氱悊锛屽緱 PE^2=PB^+BE^2=2^2+2^2=8 PE^2+CE^2=8+1=9=3^2=PC^2 鈭粹柍PEC鏄疪t鈻,涓 鈭燩EC=90掳 鈭粹垹APB=鈭燘EC=鈭燩EB+鈭燩EC=45掳+90=135掳 锛坧s锛氬張鏄吀棰橈級4. 棰樼洰鏈夐敊2MN涓嶇瓑浜嶦C 5.蹇樹簡
绛旓細鍕捐偂瀹氱悊鍗侀亾鍏稿瀷棰樺涓嬶細1銆佸鍥撅紝涓鏋2.6m闀跨殑姊瓙AB鏂滈潬鍦ㄤ竴绔栫洿鐨勫AO涓婏紝杩欐椂AO涓2.4m锛屽鏋滄瀛愮殑椤剁A娌垮涓嬫粦0.5m锛岄偅涔堟瀛愬簳绔疊涔熷绉0.5m鍚楋紵2銆佸皬涓芥兂鐭ラ亾鑷闂ㄥ墠灏忔渤鐨勫搴︼紝浜庢槸濂规寜浠ヤ笅鍔炴硶娴嬪嚭浜嗗涓嬫暟鎹細濡傚浘锛屽皬涓藉湪娌冲哺杈归夊彇鐐笰锛屽湪鐐笰鐨勫宀搁夊彇涓涓弬鐓х偣C锛屾祴寰椻垹CA...
绛旓細鍕捐偂瀹氱悊棰樼洰濡備笅锛1銆佺洿瑙掍笁瑙掑舰涓鐩磋杈逛负12cm锛屾枩杈归暱涓13cm锛屽垯瀹冪殑闈㈢Н鏄灏戯紵2銆佹湁鍏牴缁嗘湪妫掞紝瀹冧滑鐨勯暱鍒嗗埆鏄2锛4锛6锛8锛10锛12锛堝崟浣嶏細cm锛夛紝棣栧熬杩炵粨鑳芥惌鎴愮洿瑙掍笁瑙掑舰鐨勪笁鏍圭粏鏈ㄦ鍒嗗埆鏄灏戯紵3銆佸凡鐭ワ紝鍦ㄢ柍ABC涓紝AB=15锛孉C=13锛岄珮AD=12锛屽垯鈻矨BC鐨勫懆闀夸负澶氬皯锛4銆佸湪Rt鈻矨BC涓...
绛旓細1銆佸綋2銆3鍧囦负鐩磋杈规椂锛屾牴鎹鍕捐偂瀹氱悊锛岀涓夎竟闀夸负锛氣垰(2²+3²)=鈭13 褰撻暱涓3鐨勮竟鏄枩杈规椂锛屾牴鎹嬀鑲″畾鐞嗭紝绗笁杈归暱涓猴細鈭(3²-2²)=鈭5 2銆佲埖c-a=5锛屸埓c=5+a 鏍规嵁鍕捐偂瀹氱悊鏈夛細a²+b²=c²锛屽嵆a²+45=(5+a)²鍗砤²+...
绛旓細涓鏍圭瀛愶紝鍘熸潵楂樹竴涓堬紝铏瓙浼ゆ湁鐥咃紝涓闃甸鎶婄瀛愭姌鏂紝绔规ⅱ鎭板ソ鍒板湴闈笂锛屾姷鍦板绂诲師闀跨殑绔瑰瓙3灏鸿繙澶勶紝闂師澶勮繕鏈夊楂樼殑绔瑰瓙锛熶竴涓2.5绫抽暱鐨勬瀛愰潬鍦ㄤ竴搴у缓绛戠墿涓婏紝姊瓙鐨勫簳閮ㄧ寤虹瓚鐗0.7绫筹紝濡傛灉姊瓙鐨勯《姝ユ粦涓0.4绫筹紝姊瓙鐨勫簳閮ㄥ悜澶栨粦鍑哄杩滐紵
绛旓細3.鍋囪杩欎釜涓夎褰负ABC,鈭燗涓洪《瑙,AB=AC,搴曡竟涓築C,搴曡竟涓婄殑楂樹负AD浜C浜嶥,閭ｄ箞鈭燚AB=60掳,鎵浠モ垹B=30掳,鍗矨B=2*3=6.鎵浠D=鈭(6²-3²)=3鈭3 ,鍗矪C=2BD=6鈭3 鎵浠ュ懆闀夸负:C=6+6+6鈭3=12+6鈭3 4.璁惧叾涓や釜鐩磋杈归暱鍒嗗埆涓篴,b,閭ｄ箞:a+b=2+鈭6-2=鈭6...(1)...
绛旓細鍕捐偂瀹氱悊鏄垵涓鏁板涓涓潪甯稿熀鏈殑鍑犱綍瀹氱悊锛屽畠鐨勫畾涔変富瑕佹槸鎻忚堪鐩磋涓夎褰㈢殑涓夋潯杈圭殑鍏崇郴锛氱洿瑙掍笁瑙掑舰鐨勪袱鏉＄洿瑙掕竟鐨勫钩鏂瑰拰绛変簬鏂滆竟鐨勫钩鏂广傚湪鍙や唬鐨勮娉曚腑锛屽嬀鍜岃偂鍒嗗埆涓虹洿瑙掍笁瑙掑舰鐨勪袱鏉＄洿瑙掕竟锛屽晢鏈濇椂鏈熺殑鍟嗛珮灏卞凡缁忔彁鍑轰簡鈥滃嬀涓夎偂鍥涚巹浜斺鐨勫嬀鑲″畾鐞鐨勭壒渚嬨傚湪鐩磋涓夎褰㈣竟鐨勬湁鍏宠绠椾腑锛屽父甯歌璁...
绛旓細杩欐柟绋嬬粍涓嶅ソ瑙ｏ紝鐢ㄥ浘褰㈣绠楀櫒鏉ヨВ 鍙 a=1 b=2.4 c=2.5 瑙ｅ緱 x=0.151 y=0.142 鍙 a=1.3 b=2.4 c=2.5 瑙ｅ緱 x=0.296 y=0.27 鍙 a=1 b=2.48 c=2.5 瑙ｅ緱 x=0.296 y=0.284 缁撹锛氬彧鑳芥湁涓鍗婂帤搴︼紙15cm锛夎兘閫氳繃 瑕佹妸闂ㄥ姞瀹藉埌130cm 鎴栬呭姞楂樺埌248cm 鎵嶈兘閫氳繃 ...
绛旓細鎵浠:鈭燗DB=45掳 鏍规嵁鍕捐偂瀹氱悊锛孉D=AB=4 鎵浠:BD鐨勫钩鏂=AD鐨勫钩鏂+AB鐨勫钩鏂=32 鍦ㄤ笁瑙掑舰BDC涓紝CB鐨勫钩鏂=36 CD鐨勫钩鏂=4 鎵浠:CB鐨勫钩鏂-CD鐨勫钩鏂=32 鎭板ソ绛変簬BD鐨勫钩鏂 璇佹槑浜嗕笁瑙掑舰BDC涓氨鏄洿瑙掍笁瑙掑舰 鎵浠:鈭燙DB=90掳 鎵浠モ垹ADC=135掳 鍥炵瓟鐨勬垜涓澶存睏锛屾湁浜鏁板绗﹀彿涓嶅ソ鎵擄紝鎱㈡參鐪嬪惂 ...
