如图,四边形OABC是平行四边形,以O为圆心,OA为半径的圆交AB于D,

如图,四边形OABC是平行四边形,以O为圆心,OA为半径的圆交ABD,延长AO交⊙OE,连接CDCE,若CE是⊙O的切线,解答下列问题:

1)求证:CD是⊙O的切线;

2)若BC=3CD=4,求平行四边形OABC的面积.

答案

 (1)连接OD证明全等即可  (2) 12 

相关题目

Allow children the space to voice their opinions, _______they are different from
Allow children the space to voice their opinions, _______they are different from your own. A.until                  B.even if C.unless                D.as though
①               ,问苍茫大地,谁主沉浮? ②她静
①               ,问苍茫大地,谁主沉浮? ②她静默地远了、远了,                   ,走尽这雨巷。 ③但我不能放歌,      
小黄将微风电风扇与小灯泡按如图所示的电路连接,并用手
小黄将微风电风扇与小灯泡按如图所示的电路连接,并用手快速拨动风扇叶片,这时可见小灯泡发光,关于这实验有下列说法,其中正确的是 A.电风扇
They worked day and night for two weeks _____ everything returned to normal. A
They worked day and night for two weeks _____ everything returned to normal. A.before        B.after            C.when         D.then
(3分)如图所示、在倾角为的斜面上以速度v。水平抛出一小
(3分)如图所示、在倾角为的斜面上以速度v。水平抛出一小球,该斜面足够长,则从抛出开始计时,经过时间为              小球落到斜面上。
—Why didn’t he come to the meeting? —The reason           this w
—Why didn’t he come to the meeting? —The reason           this was         he forgot. A.about; why          B.for; why       C.for; that         
 He asked, “How are you getting along?”         He asked _______.
 He asked, “How are you getting along?”         He asked _______.   A. how am I getting along                                     B. how are you ge

最新题目