题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001753-11550.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001753-16371.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001754-80001.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001753-11550.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001754-31760.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001753-16371.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001754-80001.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001754-27240.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001755-78563.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001755-38941.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001755-31153.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001755-34093.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001754-80001.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001753-16371.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001756-45424.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001756-24474.jpg)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001756-40171.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001756-32491.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001757-16691.png)
答案
解析
试题分析:(1)根据四边形的外角等于内角的对角时四点共圆,证
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001757-55501.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001757-28563.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001757-64492.png)
试题解析:(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001758-57463.jpg)
证明:连结
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001758-11878.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001753-11550.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001753-16371.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001758-46799.png)
在
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001758-83831.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001758-89853.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001759-88060.png)
又∵
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001759-66103.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001757-55501.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001757-28563.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001757-64492.png)
(2)∵
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001757-64492.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001759-18503.png)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001800-95128.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001753-16371.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001800-85979.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001800-79764.png)
又因为
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001800-62081.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001801-44163.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001801-68043.png)
核心考点
试题【如图,是圆的直径,是延长线上的一点,是圆的割线,过点作的垂线,交直线于点,交直线于点,过点作圆的切线,切点为.(1)求证:四点共圆;(2)若,求的长.】;主要考察你对圆锥曲线性质探讨等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001743-75676.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001743-75676.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001744-95920.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001744-51467.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001744-85304.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001744-90969.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001745-86651.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001745-64971.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001745-82137.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001745-76506.jpg)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001744-51467.png)
(2)求圆
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001743-75676.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001735-87529.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001736-36592.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001736-88757.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001736-36592.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001736-88757.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001735-87529.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001736-86596.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001736-71644.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001736-63806.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001736-84541.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001736-82473.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001737-91485.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001737-13809.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001736-36592.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001737-79568.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001737-81412.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001737-96602.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001737-20551.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001726-30245.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001726-11996.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001726-44280.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001727-82890.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001727-77043.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001715-39627.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001715-42194.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001715-73527.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001716-21446.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001716-40219.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001716-29680.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001717-74905.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108001709-92793.jpg)
最新试题
- 1正方形通过剪切可以拼成三角形,方法如下:仿上用图示的方法,解答下列问题,操作设计(1)对直角三角形,设计一种方案,将它分
- 2【题文】根据阳光照射图,回答以下问题(6分) (1)阴影部分表示黑夜,非阴影表示白天,在图上标出太阳直射点。(2)该图表
- 3(12分)某实验小组利用拉力传感器和速度传感器探究功和动能变化的关系,如图甲所示,他们将拉力传感器固定在小车上,用不可伸
- 4在电压不变的情况下,_________和________成反比;在电阻一定的情况下,__________和_______
- 5小布什总统上台后实施“宏观调控、微观自主”的经济政策,美国迎来了新一轮的经济扩张,创下了美国经济发展史上的新纪录。
- 6古诗阅读题奉晚宋 周敦颐花落柴门拾夕晖,昏鸦数点傍林飞。吟余小立阑干外,遥见樵渔一路归。(1)这首诗中哪一句话交代
- 7(1)解方程:(x+1)2-144=0;(2)计算:6tan230°-3sin60°+2tan45°.
- 8远古时代的传说,反映了我国从人类起源到迈向文明的巨大飞跃,在古史传说的英雄人物中,被尊奉为为中华民族的“人文始祖”的是
- 9一实验小球沿着图示的三段光滑轨道运动,从点E开始由静止释放,到达Q点时速度减为0,下列v-t、a-t的图象中能表示球在这
- 10在25℃、101kPa下,1g乙醇完全燃烧生成CO2和液态水时放热29.72kJ,下列热化学方程式正确的是( )A.
热门考点
- 1-I’d like you to tell me something about Shennongjia.-I’m so
- 2将大肠杆菌的核糖体用15N标记,并使该菌被噬菌体感染,然后把大肠杆菌移入含有32P和35S的培养基中培养,请回答:(1)
- 31901年,梁启超发表《中国史叙论》,他把中国历史分为“中国之中国”、“亚洲之中国”、“世界之中国”三个阶段。其中第三阶
- 42010年3月14日第十一届全国人民代表大会第三次会议通过关于修改《中华人民共和国全国人民代表大会和地方各级人民代表大会
- 5阅读理解。 New economy online People are talking about t
- 6下列句子中,没有语病、句意明确的一项是( )A.“蓝牙”是一种短距离无线传输技术,它以内置的蓝牙芯片取代传统的线缆,能
- 7公元前207年项羽以少胜多在 大败秦军主力;383年东晋在
- 8阅读下文,完成下面的题。(一) 崔杼与庆封谋***齐庄公。庄公死,更立景公,崔杼相之。 庆封又欲***崔杼而代之相。于是扌豕
- 9—Can you see a boy there? —No, _______.[ ]A. I"m not B.
- 10近年来大量出现下图这样的公益广告。导致这类广告大量出现的原因包括①世界人口增长速度过快②可持续发展理念广泛传播③世界政治