在Rt△ABC中∠ACB=90°,CD⊥AB,AC=6,AD=3.6,则BC= ,图在这里http://www.jledu.com.cn/stjj/%CA%FD%D1%A7/%CD%AC%B2%BD%CA%D4%CC%E2/%B3%F5%D6%D0/%B3%F5%B6%FE/%BC%B8%BA%CE/%CF%E0%CB%C6%C8%FD%BD%C7%D0%CE%BC%B0%C6%E4%C5%D0%B6%A8%C1%B7%CF%B0.doc要
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/11 15:10:01
![在Rt△ABC中∠ACB=90°,CD⊥AB,AC=6,AD=3.6,则BC= ,图在这里http://www.jledu.com.cn/stjj/%CA%FD%D1%A7/%CD%AC%B2%BD%CA%D4%CC%E2/%B3%F5%D6%D0/%B3%F5%B6%FE/%BC%B8%BA%CE/%CF%E0%CB%C6%C8%FD%BD%C7%D0%CE%BC%B0%C6%E4%C5%D0%B6%A8%C1%B7%CF%B0.doc要](/uploads/image/z/13350453-69-3.jpg?t=%E5%9C%A8Rt%E2%96%B3ABC%E4%B8%AD%E2%88%A0ACB%3D90%C2%B0%2CCD%E2%8A%A5AB%2CAC%3D6%2CAD%3D3.6%2C%E5%88%99BC%3D++++++%2C%E5%9B%BE%E5%9C%A8%E8%BF%99%E9%87%8Chttp%3A%2F%2Fwww.jledu.com.cn%2Fstjj%2F%25CA%25FD%25D1%25A7%2F%25CD%25AC%25B2%25BD%25CA%25D4%25CC%25E2%2F%25B3%25F5%25D6%25D0%2F%25B3%25F5%25B6%25FE%2F%25BC%25B8%25BA%25CE%2F%25CF%25E0%25CB%25C6%25C8%25FD%25BD%25C7%25D0%25CE%25BC%25B0%25C6%25E4%25C5%25D0%25B6%25A8%25C1%25B7%25CF%25B0.doc%E8%A6%81)
在Rt△ABC中∠ACB=90°,CD⊥AB,AC=6,AD=3.6,则BC= ,图在这里http://www.jledu.com.cn/stjj/%CA%FD%D1%A7/%CD%AC%B2%BD%CA%D4%CC%E2/%B3%F5%D6%D0/%B3%F5%B6%FE/%BC%B8%BA%CE/%CF%E0%CB%C6%C8%FD%BD%C7%D0%CE%BC%B0%C6%E4%C5%D0%B6%A8%C1%B7%CF%B0.doc要
在Rt△ABC中∠ACB=90°,CD⊥AB,AC=6,AD=3.6,则BC= ,
图在这里http://www.jledu.com.cn/stjj/%CA%FD%D1%A7/%CD%AC%B2%BD%CA%D4%CC%E2/%B3%F5%D6%D0/%B3%F5%B6%FE/%BC%B8%BA%CE/%CF%E0%CB%C6%C8%FD%BD%C7%D0%CE%BC%B0%C6%E4%C5%D0%B6%A8%C1%B7%CF%B0.doc
要解答过程啊,麻烦喇!
在Rt△ABC中∠ACB=90°,CD⊥AB,AC=6,AD=3.6,则BC= ,图在这里http://www.jledu.com.cn/stjj/%CA%FD%D1%A7/%CD%AC%B2%BD%CA%D4%CC%E2/%B3%F5%D6%D0/%B3%F5%B6%FE/%BC%B8%BA%CE/%CF%E0%CB%C6%C8%FD%BD%C7%D0%CE%BC%B0%C6%E4%C5%D0%B6%A8%C1%B7%CF%B0.doc要
先假设BD=X
根据三角形ACD相似于ABC
那么得
6/(3.6+X)=3.6/6
解得
BD=6.4
所以
BC=根号下((3.6+6.4)*(3.6+6.4)-36)
=8