如图，在△ABC中，AB＞AC，分别以点B和点C为圆心，大于BC一半的长为半径作圆弧，两弧相交于点M和点N，作直线MN交AB于点D；连结CD.若AB＝7，AC＝5，则△ACD的周长为

题干

如图，在△ABC中，AB＞AC，分别以点B和点C为圆心，大于BC一半的长为半径作圆弧，两弧相交于点M和点N，作直线MN交AB于点D；连结CD.若AB＝7，AC＝5，则△ACD的周长为（）

A：2 $\sqrt{6}$

B：12

C：17

D：19

上一题下一题 0.0难度选择题更新时间:2019-01-14 09:39:37

B

Plan for this trip

Sunday	Lily has a rest in the hotel. John and Tom go to visit their Chinese friends.
Monday	Lily, John and Tom go to the Great Wall.
Tuesday	Lily and John go shopping. Tom watches TV in the hotel.
Wednesday	Lily, John and Tom go to the Palace Museum.
Thursday	Lily and Tom go to Tian'anmen Square. John goes to the movie theatre to watch a movie.
Friday	Lily and her Chinese friend go shopping. John and Tom go to the zoo.
Saturday	Lily, Tom and John leave China and go back to the U. S.