题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029165424-54024.png)
A.5 | B.7.5 | C.![]() | D.10 |
答案
解析
∴∠CBD=∠ABD,
∵AD∥BC,
∴∠ADB=∠ABD,
∴∠ADB=∠ABD,
∴AD=AB=CD,
∵AD∥BC,AB=CD,
∴∠C=∠ABC=2∠DBC=60°,
∴∠BDC=180°-∠C-∠DBC=90°,
∴BC=2AD=10,
故选D.
核心考点
举一反三
的四边形是( )
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029165342-54793.jpg)
A.邻边不等的矩形 | B.等腰梯形 |
C.有一角是锐角的菱形 | D.正方形 |
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029165335-33748.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029165335-20506.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029165335-17931.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029165335-33748.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029165335-99209.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029165335-85867.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029165336-47615.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029165336-12578.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029165336-26155.png)
A.![]() | B.![]() | C.3 | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029165207-19998.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029165207-26671.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029165207-95833.png)
且
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029165208-27983.png)
(1)求证:CM⊥DM;
(2)求点M到CD边的距离.(用含
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029165207-19998.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029165207-26671.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029165208-60729.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164941-13146.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164941-44236.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164941-85264.png)
(1)在图1中画出一腰长为
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164941-73217.png)
(2)在图2中画出一底边长为
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164941-73217.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164920-64628.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164920-86870.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164921-61713.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164921-78691.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164921-24029.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164921-32530.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164922-71599.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164922-70708.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164922-25841.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164922-48325.png)
(1)如图1,连接
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164922-20499.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164923-80719.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164923-96897.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164922-20499.png)
(2)如图2,动点
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164923-15256.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164923-29143.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164924-26606.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164924-41682.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164924-69140.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164924-97253.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164923-15256.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164924-26606.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164922-25841.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164925-95932.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164924-26606.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164923-29143.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164924-41682.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164925-59853.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164922-70708.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164924-41682.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164923-15256.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164925-92435.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164923-29143.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164925-92435.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164925-74110.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164924-26606.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164924-41682.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164923-15256.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164923-29143.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164925-74110.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191029/20191029164925-19526.png)
最新试题
- 1下列各项组合中,能体现生命系统由简单到复杂的正确层次是①皮肤 ②胃黏膜 ③神经元 ④变形虫 ⑤细胞内蛋白质等化合物 ⑥病
- 2社团活动在潍坊各校轰轰烈烈开展,小明参加了杂技社团,他常常在平整松软的土地上练习单脚站立和单手倒立,当他单脚站立时,在地
- 3胡锦涛同志在党的十七大报告中提出,社会建设与人民幸福安康息息相关。必须在经济发展的基础上,更加注重社会建设,着力保障和改
- 4实验室常用下列装置制取气体,请你根据所学知识回答下列问题。 (1)写出编号所指仪器的名称:①____________ ②
- 5We have ______ our position on the issue! Whatever happens,
- 62SO2(g)+ O2(g) 2SO3(g) △H =" a" kJ·mol-1,反应过程的能量变化如图所示。已知1mo
- 7听下面一段材料,回答第1至4题。1. Where are the speakers?A. On a plane
- 8下列句子中,没有语病的一项是A.“神舟八号”飞船与“天宫一号”目标飞行器成功对接,实现了属于中国的“太空之吻”,标志着中
- 9荷兰一家公司培育出了一批转基因牛,这些牛的乳汁中含有人乳铁蛋白,人乳铁蛋白可以抑制消化道细菌感染.在此项工程中,转基因牛
- 10When I was young, I ______ get up at 5 and go for a long tir
热门考点
- 1Did you ever hear me ___ by the strict teacher.A.be3ing scol
- 2在营养供应充足的条件下,向日葵的部分果实仍是空瘪的,这主要是由于( )A.水分不足B.温度太高C.传粉不足D.光照不足
- 3阅读以下材料,回答问题。《三国志》有明确记载说曹操死在洛阳,葬在邺城。现在的临漳、磁县和安阳县分属两省,隔河相望,距邺城
- 4函数f(x)=3sin(2x-π3)-2图象的一条对称轴是( )A.x=π6B.x=π3C.x=5π12D.x=7π1
- 53a2b3c的系数是( ),次数是( );πR2的系数是( ),次数是( )。
- 6信江河被称为“上饶的母亲河”。长期以来,信江河的污染情况严重,如今政府已投入大量的资金进行综合治理。下列是互联网上网民对
- 7在绚丽多姿的生物世界里,生物种类丰富,个体数量庞大,但却找不到完全相同的个体,说明生物界中普遍存在着( )现象.A.生
- 8新华社北京电:海峡两岸关系协会会长汪道涵25日给宋美龄亲属发去唁电,对宋美龄女士逝世深表哀悼。唁电全文如下:“……宋女士
- 920050=______,(-12)-2=______.
- 10书面表达。 最近你校进行了一次“说出你的烦恼”(“Don"t keep your worries”) 的调查活动