题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010124-55298.png)
A、
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010124-61168.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010124-84969.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010125-15663.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010125-47174.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010125-21000.png)
答案
解析
∴∠PEB=∠PAC,
∵AE是∠APE的平分线,
∴∠EPC=∠APC,
根据三角形的外角与内角关系有:
∠EDC=∠PEB+∠EPC;∠ECD=∠PAC+∠APC,
∴∠EDC=∠ECD,
∴△EDC为等腰三角形,又∠AEB=30°,
∴∠EDC=∠ECD=75°,
即∠PCE=75°,
故答案为B
核心考点
试题【.如图,过点P作圆O的割线PBA与切线PE,E为切点,连接AE,BE,∠APE的平分线分别与AE、BE相交于C、D,若∠AEB=,则∠PCE等于( )A、 】;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/20191108/20191108010118-27300.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010118-25597.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010118-82551.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010118-82551.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010118-11607.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010118-75376.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010118-75376.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010118-82551.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010119-54245.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010119-38314.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010119-10481.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010120-81539.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010120-20715.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010120-73659.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010107-37055.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010107-40492.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010108-17781.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010107-40492.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010108-70642.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010108-77758.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010108-34939.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010108-46394.png)
(Ⅰ) 求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010108-70642.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010107-40492.png)
(Ⅱ)如果弦
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010108-99333.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010108-17781.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010109-36999.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010109-52209.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010109-50987.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010109-38562.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010109-59777.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010054-88472.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010054-65175.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010054-94692.png)
A.2 | B.4 | C.6 | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010051-28961.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108010048-11822.png)
则图中共有相似三角形 ( )
A.1对 | B.2对 | C.3对 | D.4对 |
最新试题
- 1如图所示的几何体的右视图(从右边看所得的视图)是( )A.B.C.D.
- 2如图,已知点A(0,2)和抛物线y2=x+4上两点B、C,使得AB⊥BC,求点C的纵坐标的取值范围.
- 3(10邵阳14)有一种粒子的结构示意图为,下列说法不正确的是A.该粒子具有稳定结构B.该元素是一种金属元素C.该粒子是一
- 4已知△ABC,点H,O为△ABC所在平面内的点,且AH•AB=AH•AC,BH•BA=BH•BC,OA+OB+OC=OH
- 56.下列不是对月亮的别称的是 A.桂魄B.望舒C.东曦D.玉镜
- 6已知等差数列{an}的前n项和为Sn=pn2-2n+q(p,q∈R),n∈N+。(1)求q的值;(2)若a1与a5的等差
- 7实行依法执政,最重要的就是党的各级组织和领导要带头维护宪法和法律的权威,并督促、支持和保证国家机关依法行使职权。依法执政
- 8根据句意,用所给词的适当形式填空。 1. He found many people ______________ (da
- 9铁生锈是比较常见的现象,某实验小组,为研究铁生锈的条件,设计了以下快速、易行的方法:图11-21首先检查制氧装置的气密性
- 10下列物质水解的最终产物不含葡萄糖的是A.蛋白质B.淀粉C.蔗糖D.纤维素
热门考点
- 1It is amazing that the little boy can swim ________the river
- 2Millie likes reading, she often goes to _______.A. the class
- 3已知集合,则 。
- 4写作。 命题作文:一次班级表演,我发现自己竟拥有如此美妙的歌喉;一番书海徜徉,我发现思绪驰骋原来是这样的自由
- 5化学老师需要利用天平称量20g某粉末状化学药品,正确的操作方法是( )A.将化学药品直接放在天平的左盘内,右盘加20g
- 6下面同学的做法,不珍爱生命的是 ( )A.遇到挫折、失败不轻言放弃生命B.人活着为了一口气,舍弃生命也得争一
- 7电暖器接入电路时与其他家用电器的连接方式是 (选填“串联”或“并联”).将一个“220V 600W”的电暖器
- 8下面文字“□”中标点使用恰当的一项是 [ ] 我的最后一堂法语课! 我几乎还不会作文呢□ 我再也
- 9短短七年的时间,中国高铁走完了外国30年的发展之路,这夺目的成绩在于我们选择了适合我国国情的自主创新之路——引进、消化、
- 10如图,⊙O的半径为5,直径AB⊥CD,以B为圆心,BC长为半径作,则与围成的新月形ACED(阴影部分)的面积为(