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1、第1页共 25页2015-2016 学年陕西省西安市高新一中八年级下期中数学试卷一、选择题每题3 分1 3 分如图图形中，既是轴对称图形又是中心对称图形的是A B C D2 3 分以下等式由左边至右边的变形中，属于因式分解的是Ax2+5x1=xx+51 Bx24+3x=x+2 x2+3xCx2x+=x2D4x2y2=4x+y 4xy3 3 分如图，在四边形ABCD中，对角线 AC、BD 相交于点 O，以下条件不能判定四边形 ABCD为平行四边形的是AABCD，ADBC BOA=OC，OB=OD C AD=BC，ABCD D AB=CD，AD=BC4 3 分如图，将 ABC绕点 A 按逆时针方向
2、旋转40 到AB C的位置，连接CC ，假设 CC AB，则 BAC的大小是A55B60C 65D705 3 分a、b、c 是三角形的三条边长，则代数式a2c22ab+b2的值A大于零B小于零C等于零D与零的大小无关6 3 分假设分式的值为零，则 x 的值为A0 B1 C 1 D1第2页共 25页7 3 分某小区为了排污，需铺设一段全长为720米的排污管道，为减少施工对居民生活的影响，须缩短施工时间，实际施工时每天的工作效率比原计划提高20%，结果提前 2 天完成任务设原计划每天铺设x 米，下面所列方程正确的选项是A=2 B=2C=2 D=8 3 分顺次连接四边形四条边的中点，所得的四边形是菱
3、形，则原四边形一定是A平行四边形B对角线相等的四边形C矩形D对角线互相垂直的四边9 3 分如图，ABC中，AB=4，AC=3，AD、AE分别是其角平分线和中线，过点 C作 CG AD于 F，交 AB于 G，连接 EF，则线段 EF的长为AB1 C D710 3 分如图，分别以直角 ABC的斜边 AB，直角边 AC为边向 ABC外作等边ABD和等边 ACE，F为 AB的中点，DE与 AB交于点 G，EF与 AC交于点 H，ACB=90 ，BAC=30 给出如下结论：EF AC；四边形 ADFE为菱形；AD=4AG；FH=BD；其中正确结论的是ABCD文档编码:CK6A4X1K9X3 HV9J5A
4、10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E
5、2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6
6、A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J
7、5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C
8、9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:C
9、K6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV
10、9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2第3页共 25页二、填空题每题3 分11 3 分一个正多边形的内角和为540，则这个正多边形的每一个外角等于12 3 分如图，边长为 a、b 的矩形，它的周长为14，面积为 10，则 a2b+ab2的值为13 3 分假设，则的值是14 3 分假设关于 x 的分式方程2=有增根，则 m 的值为15 3 分如图，
11、在菱形 ABCD中，对角线 AC与 BD相交于点 O，AC=16，BD=12，OE BC，垂足为点 E，则 OE=16 3 分如图，正方形ABCD的对角线相交于点O，正三角形 OEF绕点 O 旋转在旋转过程中，当AE=BF时，AOE的大小是17 3 分如图 RtABC中，BAC=90 ，AB=3，AC=4，点 P为 BC上任意一点，连接 PA，以 PA，PC为邻边作平行四边形PAQC，连接 PQ，则 PQ的最小值为文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A
12、4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5
13、A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9
14、E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK
15、6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9
16、J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8
17、C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:
18、CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2第4页共 25页三、解答题18 14 分 1分解因式：2a312a2+8a2计算：3解方程：=119 4分已知：MAN，求作一个菱形 ABCD，使MAN 为菱形 ABCD的一个内角 尺规作图，不写作法，保留作图痕迹20 6 分全民健身活动中，组委会组织了长跑队和自行车进行宣传，全程共10 千米，自行车队速度是长跑队的速度的2.5 倍，自行车队出发半小时后，长跑队才出发，结果长跑队比自行车车队晚到了2 小时，求长跑队跑步的速度21 7 分如图，
19、E、F 是平行四边形 ABCD的对角线 AC上两点，且 BE DF，求证：四边形 BFED是平行四边形22 8 分如图，在 RtABC中，ACB=90 ，D、E分别为 AB，AC边上的中点，连接 DE，将 ADE绕点 E旋转 180 得到 CFE，连接 AF，AC1求证：四边形 ADCF是菱形；2假设 BC=8，AC=6，求四边形 ABCF的周长文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编
20、码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3
21、 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5
22、 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文
23、档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9
24、X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1
25、C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N
26、2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2第5页共 25页23 10 分如图，在平面直角坐标系中，有一个直角ABC，且 A1，3，B3，1，C 3，3，已知 A1A1C是由 ABC旋转得到的1请写出旋转中心的坐标是，旋转角是度；2求线段 AB所在直线 AB的解析式；3点 Q 在 x 轴上，点 P在直线 AB上，要使以 Q、P、A1、C1为顶点的四边形是平行四边形，求所有满足条件点P的坐标24 8 分 1如图在平行四边形ABCD中，PQ、MN 分别平行 DC、AD、PQ、MN 交于 O 点，其中 S四边形AMOP=3，S四边形MBQO=4，S四边形NCQ
27、O=10，则DMQ 的面积=2已知正数a，b，c，d 满足=4，=9，=，=，则 a+cbd=25 12 分类比等腰三角形的定义，我们定义：有一组邻边相等的凸四边形叫做“等邻边四边形”1概念理解：如图 1，在四边形 ABCD中，添加一个条件使得四边形ABCD是“等邻边四边形”请文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E
28、5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4
29、X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A
30、10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E
31、2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6
32、A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J
33、5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C
34、9E2E5N2第6页共 25页写出你添加的一个条件，你添加的条件是2问题探究：如图 2，在“等邻边四边形”ABCD中，DAB=60 ，ABC=ADC=90 ，AB=AD=6，求对角线 AC的长3拓展应用：如图 3，“等邻边四边形”ABCD中，AB=AD，BAD=60 ，BCD=30 ，AC 为对角线，试探究 AC，BC，DC的数量关系文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A
35、4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5
36、A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9
37、E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK
38、6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9
39、J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8
40、C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:
41、CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2第7页共 25页2015-2016 学年陕西省西安市高新一中八年级下期中数学试卷参考答案与试题解析一、选择题每题3 分1 3 分如图图形中，既是轴对称图形又是中心对称图形的是A B C D【解答】解：A、不是轴对称图形，因为找不到任何这样的一条直线，沿这条直线对折后它的两部分能够重合；即不满足轴对称图形的定义 是中心对称图形故错误；B、不是轴对称图形，因为找不到任何这样的一条直线，沿这条直线对折后它的两部分能够重合；即不满足轴对称图形的定义不是中心对称图形故错误；C、是轴对称图形，不是中心对称图形故错误；D、是轴对称图形是
42、中心对称图形，故正确故选：D2 3 分以下等式由左边至右边的变形中，属于因式分解的是Ax2+5x1=xx+51 Bx24+3x=x+2 x2+3xCx2x+=x2D4x2y2=4x+y 4xy【解答】解：A、右边不是积的形式，故A错误；B、右边不是积的形式，故B错误；C、正确D、4x2y2=2x+y 2xy，故 D 错误故选：C3 3 分如图，在四边形ABCD中，对角线 AC、BD 相交于点 O，以下条件不文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K
43、9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z
44、1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5
45、N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X
46、1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A1
47、0Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2
48、E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A
49、4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2第8页共 25页能判定四边形 ABCD为平行四边形的是AABCD，ADBC BOA=OC，OB=OD C AD=BC，ABCD D AB=CD，AD=BC【解答】解：A、根据两组对边分别平行的四边形是平行四边形可判定四边形ABCD为平行四边形，故此选项不合题意；B、根据对角线互相平分的四边形是平行四边形可判定四边形ABCD为平行四边形，故此选项不合题意；C、不能判定四边形ABCD是平行四边形，故此选项符合题意；D、根据两组对边分别相等的四边形是平行四
50、边形可判定四边形ABCD为平行四边形，故此选项不合题意；故选：C4 3 分如图，将 ABC绕点 A 按逆时针方向旋转40 到AB C的位置，连接CC ，假设 CC AB，则 BAC的大小是A55B60C 65D70【解答】解：ABC绕点 A 按逆时针方向旋转40 到AB C 的位置，AC=AC ，CAC=40，AC C=ACC=70，CC AB，BAC=ACC=70，故选：D5 3 分a、b、c 是三角形的三条边长，则代数式a2c22ab+b2的值文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8C9E2E5N2文档编码:CK6A4X1K9X3 HV9J5A10Z1C5 ZQ8