如图已知⊙o的直径ab经过弦cd的中点e连接bcbd则下列结论错误的是 A．ab⊥cdb．bc=bdc．∠bcd=∠bdcd．oe Sketch Coloring Page

如图已知⊙o的直径ab经过弦cd的中点e连接bcbd则下列结论错误的是 A．ab⊥cdb．bc=bdc．∠bcd=∠bdcd．oe Template

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tomski如图已知⊙o的直径ab经过弦cd的中点e连接bcbd则下列结论错误的是 a．ab⊥cdb．bc=bdc．∠bcd=∠bdcd．oe coloring

已知：AB是⊙O的直径，弦CD交AB于点E，且．（1）如图1，求证：CE=DE；（2）如图2，连接AC，点F为AC上的一点，连接BF，过点C作 sketch template

如图已知AB是⊙O的直径CD是弦且CD⊥ABBC=6AC=8则sin∠ABD的值是ABCD——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

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

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1已知AB是⊙O的直径弦CD⊥AB于点E点M在⊙O上∠M=∠D1判断BC与MD的位置关系并说明理由2若AE=8BE sketch template

如图已知AD是⊙O的直径ABAC是弦且AB=AC．1求证直径AD平分∠BAC2若BC经过半径OA的中点EF是CD的中点 sketch template

已知：AB是⊙O的直径，弦CD交AB于点E，且．（1）如图1，求证：CE=DE；（2）如图2，连接AC，点F为AC上的一点，连接BF，过点C作 sketch template

已知如图AB是⊙O的直径AC是⊙O的弦AB=2∠BAC=30°．在图中作弦AD使AD=1并求∠CAD的度数．题目和参考答案 sketch template

如图四边形ABCD内接于⊙OAB是⊙O的直径AC和BD相交于点E且1求证BC=CD2分别延长ABDC交于点P过点A作 sketch template

如图已知AB和CD为⊙O的两条直径弦CE//AB 的度数为400则 ∠BOC= 度——青夏教育精英家教�—— sketch template

如图⊙O的直径AB的长为10弦AC长为6∠ACB的平分线交⊙O于D则AD长为A．8B．5C．D．题目和参考答案——青夏教育精英家教�—— sketch template

如图已知AB是⊙O的直径弦CD与AB交于点EF为CD的延长线上一点连接AF且FA2=FD•FC．1求证FA为⊙O的切线2 sketch template

如图，⊙O的直径AB和弦CD相交于点E，已知AE=1cm，EB=5cm，∠DEB=60°，（1）求CD的长；（2）若直线CD绕点E顺时针 sketch template

如图1AB是⊙O的直径直线l交⊙O于CD两点AE⊥直线l垂足为E 1求证AC·AD=AB·AE 2若将直线l�上平移 sketch template

如图，AB是⊙O的直径，点C为的中点，CF为⊙O的弦，且CF⊥AB，垂足为E，连接BD交CF于点G，连接CD，AD，BF sketch template

如图已知AB是⊙O的直径点C在⊙O上过点C的直线与AB的延长线交于点PAC=PC∠COB=2∠PCB．1求证PC是⊙O的切线 sketch template

本题7分如图已知⊙O的半径为5弦ABCD所对的圆心角分别是∠AOBCOD若∠AOB与∠COD互补弦CD=6则弦AB的长为 sketch template

如图已知AB为⊙O的直径AB=2AD和BE是圆O的两条切线AB为切点过圆上一点C作⊙O的切线CF分别交ADBE于点MN sketch template

已知如图AB是⊙O的直径AC是⊙O的弦AB=2∠BAC=30°．在图中作弦AD使AD=1并求∠CAD的度数．题目和参考答案 sketch template

如图在半径为3的⊙O中直径AB与弦CD相交于点E连接ACBD若AC=2则tanD=2$sqrt{2}$．题目和参考答案——青夏 sketch template

如图⊙O的直径AB与弦AC的夹角为30°切线CD与AB的延长线交于点D．若⊙O的半径为3则CD的长为．题目和参考答案——青夏教育精英家教�—— sketch template

如图已知AB是⊙O的直径点CD在⊙O上∠ABC=50°则∠D为 A30°B40°C50°D60° 题目和参考答案 sketch template

如图AB是⊙O的直径点C在BA的延长线上直线CD与⊙O相切于点D弦DF⊥AB于点E线段CD=10连接BD1求证∠CDE=2∠ sketch template

如图在⊙O中直径AB垂直弦CDE为弧BC上一点下列结论�∠1=∠2�∠3=2∠4�∠3 ∠5=180°．其中正确的是 ．题目和 sketch template

题目如图已知AB为半圆O的直径P为半圆上的一个动点以OPOB为一组邻边作POBQ连接OQAP设OQAP的中点分别为MN sketch template

如图AB是⊙O的直径BC是⊙O的弦半径OD⊥BC垂足为E若BC=6DE=3 1图中有很多结论例如OA=OC=OD=OB等 sketch template

如图四边形ABCD内接于⊙OBC是直径AD=DC∠ADB=20则∠ACB∠DBC分别为 A．15与30 B．20与35C sketch template

如图所示已知⊙O1与⊙O2外切于点E．求证若⊙O1的直径AB与⊙O2的直径CD平行则直线AD和BC相交于点E．题目和参考答案——青夏 sketch template

如图已知AB是⊙O的直径CD是半圆上两点．AB=26AC=101若点D是$widehat{AB}$的中点求AD的长2若点D sketch template

如图，已知⊙O是 ABC的外接圆，AB是⊙O的直径，直线CD与⊙O相切于点C，DO∥AC交弦BC于点F，交优弧于点E，连接BD，BE．（1 sketch template

如图 已知ab为圆o的直径d是弧bc的中点答案及详细解析过程——青夏教育精英家教�—— sketch template

如图已知AB是⊙O的直径点C在⊙O上过点C的直线与AB的延长线交于点PAC=PC∠COB=2∠PCB．1求证PC是⊙O的切线 sketch template

如图 已知ab为圆o的直径d是弧bc的中点答案及详细解析过程——青夏教育精英家教�—— sketch template

如图已知AE为⊙O的直径 ABC内接于⊙OAD⊥BC于H交⊙O于D．I求证BAD=∠CAE2若∠ACB=30°CD=3求 sketch template

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