16．如图ab是⊙的弦于点c若则⊙o的半径为 Cm．——青夏教育精英家教�—— Sketch Coloring Page

16．如图ab是⊙的弦于点c若则⊙o的半径为 Cm．——青夏教育精英家教�—— Template

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tomski16．如图ab是⊙的弦于点c若则⊙o的半径为 cm．——青夏教育精英家教�—— coloring

16．如图AB是⊙的弦于点C若则⊙O的半径为 cm．——青夏教育精英家教�—— sketch template

如图AB为⊙O的直径弦BCDE相交于点F且DE⊥AB于点G过点C作⊙O的切线交DE的延长线于点H．1求证HC=HF2若⊙ sketch template

如图AB是⊙O的弦D为半径OA的中点过D作CD⊥OA交弦AB于点E交⊙O于点F且CE=CB连接AFBF．1求证BC是⊙O的 sketch template

如图AB是⊙O的直径CD是⊙O的弦 ABCD的延长线交于E点已知AB=2DE∠E=18° 则∠AOC的度数为 ．——青夏教育精英 sketch template

如图AB是⊙O的直径弦CD⊥AB于点E∠CDB=30°⊙O的半径是23cm则弦CD的长为 A．23cmB．6cmC．3cmD sketch template

如图AB是⊙O的直径点C在⊙O上∠BOC=108°过点C作直线CD分别交直线AB和⊙O于点DE连接OEDE=12ABOD=2 sketch template

已知如图AB是⊙O的直径BC是和⊙O相切于点B的切线⊙O的弦AD平行于OC．求证DC是⊙O的切线．题目和参考答案——青夏教育精英家教�—— sketch template

如图AB是⊙O的直径AD是弦点E是弧BD上一点EF⊥AD于点F且EF是⊙O的切线．1求证弧DE=弧BE2连接BE若 sketch template

ABCD是⊙O内两条互相垂直的弦相交于圆内P点圆的半径为5两条弦的长均为8则OP的长为 A3 B3 C3 D2——青夏教育 sketch template

如图AB是⊙O的直径CD是⊙O的弦 ABCD的延长线交于E点已知AB=2DE∠E=18° 则∠AOC的度数为 ．——青夏教育精英 sketch template

如图⊙O的半径为1ABC是⊙O上的三个点且∠ACB=45°则弦AB的长是 ．题目和参考答案——青夏教育精英家教�—— sketch template

已知如图OA是⊙O的半径以OA为直径的⊙C与⊙O的弦AB相交于点D．求证点D是AB的中点．题目和参考答案——青夏教育精英家教�—— sketch template

已知如图AB是⊙O的直径AC是弦∠BAC的平分线与⊙O的交点为DDE⊥AC与AC的延长线交于点E．1求证直线DE是⊙O的切线 sketch template

如图在同心圆中大圆的弦AB切小圆于C若弦AB=4则该圆环面积为 A 4π B 5π C 6π D 7π——青夏教育精英家教�—— sketch template

如图ABAC为⊙O的弦连接COBO并延长分别交弦ABAC于点EF∠B=∠C．求证CE=BF．题目和参考答案——青夏教育精英家教�—— sketch template

如图AB为⊙O的弦⊙O的半径为5OC⊥AB于点D交⊙O于点C且CD=l则弦AB的长是 ．若点P是弦AB上的一个动点那么经过点P的 sketch template

如图OE是⊙O的半径弦AB垂直平分OE点D是AEB上一点以点D为圆心的⊙D与AB相切过点AB分别作⊙D的切线两条切线相交于点C sketch template

已知 ABC是等边三角形以BC为直径的半圆O与边AB相交于点DDE⊥AC垂足为点E．1判断DE与⊙O的位置关系并证明你的结论2 sketch template

如图AB是⊙O的弦C是AB上一点∠AOC=90°OA=4OC=3求弦AB的长．题目和参考答案——青夏教育精英家教�—— sketch template

⊙O的半径为10弦AB的长为103若以O为圆心r为半径的圆与弦AB有两个交点则r的取值范围是5＜r≤105＜r≤10．题目和参考答案 sketch template

如图AB是的直径交BC的中点于D于E连接�DE是的切线则下列结论正确的个数是A．1个 B．2个 C．3个 D．4个——青夏 sketch template

如图，AB是⊙O的直径，弦DE垂直平分半径OA，C为垂足，弦DF与半径OB相交于点P，连接EF，EO MBA考试题库帮考� sketch template

如图所示单位圆中弧AB的长为xfx表示弧AB与弦AB 所围成的弓形面积的2倍则函数y=fx的图象是 ——青夏教育精英家教�—— sketch template

从圆上点所作的互相垂直的两弦．它们和圆心的距离分别为6cm和10cm则此两弦的长分别为 ——青夏教育精英家教�—— sketch template

如图，在以点O为圆心的两个同心圆中，大圆的弦AB交小圆于点C、D 已知AB=4，CD=2，圆心O到直线AB的距离为1，则大圆的半径为 ，小圆 sketch template

如图将⊙O沿弦AB折叠圆弧AB恰好经过圆心OP是$widehat{AMB}$上一点则∠APB的度数为 A．30°B．45°C sketch template

如图直线AB经过⊙O的圆心与⊙O相交于AB两点点C在⊙O上且∠AOC=30度．点E是直线AB上的一个动点直线EC交⊙O于D则使 sketch template

如图已知AB是⊙O的弦半径OC⊥AB于D且AB=8cmOC=5cm则DC的长为A 3cm B 25cm C 2cm D sketch template

基本不等式教学反思（八篇）范文118 sketch template

如图AB是⊙0的弦BC与⊙0相切于点B连接OAOB．若∠ABC=70°则∠A等于 A．15°B．20°C．30°D．70° 题目 sketch template

如图AB为⊙O的直径C为⊙O上一点弦AD平分∠BAC交BC于点EAB=6AD=5则DE的长为 A．22B．25C．2D sketch template

如图，在四边形ABCD中，对角线AC与BD交于点O，已知OA =OC，OB=OD，过点O作EF⊥ BD，分别交AB、DC于点E，F，连接DE sketch template

12．如图AB是⊙O的弦OC⊥AB于点D交⊙O于点C若⊙O的半径为10CD＝4那么AB的长为 ．——青夏教育精英家教�—— sketch template

如图AB是⊙O的直径弦BC＝2 Cm∠ABC＝60°． 1求⊙O的直径 2若D是AB延长线上一点连结CD当BD长为多�时 sketch template

在⊙O中弦AB所对的圆心角是60°则弦AB所对的圆�角是30°或150°．题目和参考答案——青夏教育精英家教�—— sketch template

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