2022年勾股定理证明练习 .pdf

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1、学习好资料欢迎下载图1CABFDE勾股定理证明习题1.已知：如图1，点 A、D、B、E在同一条直线上，AD=BE,AC DF,BC EF.求证:AC=DF.2.已知：如图2，BE AC,DF AC,垂足分别是E、F,O 是 BD的中点.求证:BE=DF.3.已知：如图3，AB=DE,BC=EF,AF=CD.求证:ABDE,BCEF.4.已知：如图4，AB=AD,AC=AE,BAD=CAE.求证:.B=D.5.已知：如图5，AD=AE,点 D、E在 BC上，BD=CE,ADE=AED.求证:ABE ACD图5CDAEB图2CDBAEF图4 E D C BA图3BACEDF学习好资料欢迎下载6.已

2、知：如图6，已知 AC、BD相交于点O，AB CD,OA=OC.求证:AB=CD 7.已知：如图7，已知 AC DF，BC=EF，C=F.求证:ABC DEF.8.已知：如图，四边形ABCD 中，ADBC，AD DC，AB AC，B=45，CD=2cm.求证：BC 的长.9.已知：如图，AD是 ABC 的高，AB=10，AD=8，BC=12。求证：ABC 是等腰三角形。10.已知：如图，在ABC 中，C=90，B=30，AB 的垂直平分线交BC 于D，垂足为 E，BD=4cm。求 AC 的长。11.在ABC中，ACAB，D为BC边 上 任 一 点，求 证：DCBDADAB22图 6OABDC图

3、7ABCFEDBCAD文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S

4、7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3

5、ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S

6、7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3

7、ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S

8、7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3

9、ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6文档编码:CR5S7D1M4D5 HQ4P4F2H9C3 ZQ5B3Y2H6L6学习好资料欢迎下载12.已知：如图，在ABCRt中，90C，D是AC的中点，ABED于E求证：（1）22243BDBCAB（2）222BCAEBE13.如图，在ABC中，90C，13AB，12BC，BCBD21（1）AD的长.（2）ABD的面积.14.如图，有一个直角三角形纸片，两直角边AC=6cm，BC=8cm，现将直角边AC沿直线

10、AD折叠，使它落在斜边AB上，且与AE重合，你能求出CD的长吗？15.若 ABC的三边 a、b、c 满足条件a2b2c2338 10a24b26c，试判断 ABC的形状.ACBDEBCADCBADE文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8

11、N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O

12、1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z

13、6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1

14、I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL

15、3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV1

16、0Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3学习好资料欢迎下载 16.已知：如图，ABC中，AB=AC=10，

17、BC=16，点 D在 BC上，DA CA于 A。求：BD的长。17.如图所示，四边形ABCD 中，AB=4，BC=3，AD=13，CD=12，B=90，?求该四边形的面积18.甲、乙两船同时从港口A出发，甲船一12 海里/时的速度向北偏东35航行，乙船向南偏东55航行。2 小时后，甲船到达C岛，乙船到达B岛，若 C、B两船相距40 海里，问乙船的速度是每小时多少海里？19.如图，王大爷准备建一个蔬菜大棚，棚宽8m，高 6m，长 20m，棚的斜面用塑料薄膜遮盖，不计墙的厚度，请计算阳光透过的最大面积.20.如图，某购物中心在会十.一间准备将高5 m,长 13m，宽 2m的楼道上铺地毯,已知地毯每

18、平方米18 元，请你帮助计算一下，铺完这个楼道至少需要多少元钱?B BCAD6m8m 20m 5m13m文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档

19、编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J

20、3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V

21、8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3

22、文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G

23、7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B

24、3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3学习好资料欢迎下载ABC21.在 ABC中，BC=a，AC=b，AB=c，且满足222244421cbcacba。试判断 ABC的形状。22.设 P是等边三角形

25、ABC内的一点，PA 3，PB 4，PC5，求 APB的度数23.已知，如图在ABC中，AB=AC，BAC=90，DAE=45，求证：DE2=BD2+CE2.24.如图，已知在ABC中，AD BC于 D，B2C，求证：22ACABAB BC25.如图，P是矩形 ABCD 内一点，PA=1，PB=5，PC=7，求 PD.26.如图所示，ABC中，2,30,45ABCB求：AC的长27.设四边形ABCD是边长为1的正方形，以正方形ABCD 的对角线AC为边作第二个正方形ACEF，再以第二个正PCBAEDCBABACD文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3

26、文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G

27、7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B

28、3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5

29、U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z

30、5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q

31、6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8

32、N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3学习好资料欢迎下载方形的对角线AF为边作第三个正方形AEGH，如此下去（1）记正方形 ABCD的边长11a，依上述方法所作的正方形的边长依次为234,.naaaa求出234,aaa的值。（2）根据上述规律写出第n 个正方形的边长na的表达式.28.如图，是一种“羊头”形图案，其作法是：从正方形开始，以它的一边为斜边，向外作等腰直角三角形，然后再

33、以直角边为边，分别向外作正方形和，依此类推，若正方形的边长为64，则正方形的边长为29.如图，ABC是直角三角形，BC是斜边，将ABP绕点 A逆时针旋转后，能与ACP重合，如果AP 3，那么._PP30.台风是一种自然灾害，它以台风中心为圆心，在周围数十千米范围内形成气旋风暴，有极强的破坏力，据气象观测，距沿海某城市A的正南方向240 千米的 B处有一台风中心，其中心风力为 12 级，每远离台风中心25 千米，风力就会减弱一级，该台风中心现正以20 千米/时的速度沿此偏东30的方向往 C移动，如图所示，且台风中心的风力不变，若城市所受风力达到或超过4 级，则称受台风影响（1）该城市是否受台风的

34、影响？请说明理由（2）若会受到台风影响，那么台风影响城市的持续时间有多长？（3）该城市受到台风影响的最大风力为几级？31.将一根长24 cm 的筷子，置于底面直径为5cm，高为12 cm 的圆柱形水杯中（如图 1），设筷子露在杯子外面的长度是为hcm，则h的取值范围是32.如图 2 所示，一个梯子AB长 2.5 米，顶端A靠墙AC山，这时梯子下端B与墙角C距离为 1.5 米，梯子滑动后停在DE上的位置上，如图3，测得DB的长 0.5 米，则梯子顶端A下落了米图 1 图 2 图 3 文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3

35、 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8

36、 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文

37、档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7

38、J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3

39、V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U

40、3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5

41、G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3学习好资料欢迎下载33.三角形的两边长分别为3 和 5，要使这个三角形是直角三角形，则第三条边长是34.小东拿着一根长竹杆进一个宽为3 米的城门，他先横着拿不进去，又竖起来拿，结果杆比城门高1 米，当他把杆斜着时，两端刚好顶着城门的对角，问杆长多少米?35.小明向西南方向走40 米后，又走了50 米，再走30 米回到原地小明又走了50 米后向哪个方向走的？36.如图，公路MN

42、和公路PQ在点P处交汇，且QPN=300，点A处有一所中学，AP=160 米，假设拖拉机行驶时，周围 100 米以内会受到噪音的影响，那么拖拉机在公路MN上沿PN方向行驶时，学校是否回受到噪声的影响？说明理由如果受影响，已知拖拉机的速度为18 千米/时，那么学校受影响的时间为多少秒？图 8 文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 Z

43、R3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编

44、码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3

45、 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8

46、 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文

47、档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7

48、J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3文档编码:CL3O1Z5G7J3 HV10Z6Q6B3V8 ZR3S1I8N5U3