如图,在三角形ABC中,∠ACB=90°,BC的垂直平分线DE交BC于点D,交AB于点E,点F在DE上,并且AF=CE(1)求证:四边形ACEF是平行四边形;(2)当∠B的大小满足什么条件时,四边形ACEF是菱形?证明你的结论.(
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/30 19:25:24
![如图,在三角形ABC中,∠ACB=90°,BC的垂直平分线DE交BC于点D,交AB于点E,点F在DE上,并且AF=CE(1)求证:四边形ACEF是平行四边形;(2)当∠B的大小满足什么条件时,四边形ACEF是菱形?证明你的结论.(](/uploads/image/z/2482319-47-9.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%9C%A8%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E4%B8%AD%2C%E2%88%A0ACB%3D90%C2%B0%2CBC%E7%9A%84%E5%9E%82%E7%9B%B4%E5%B9%B3%E5%88%86%E7%BA%BFDE%E4%BA%A4BC%E4%BA%8E%E7%82%B9D%2C%E4%BA%A4AB%E4%BA%8E%E7%82%B9E%2C%E7%82%B9F%E5%9C%A8DE%E4%B8%8A%2C%E5%B9%B6%E4%B8%94AF%3DCE%EF%BC%881%EF%BC%89%E6%B1%82%E8%AF%81%EF%BC%9A%E5%9B%9B%E8%BE%B9%E5%BD%A2ACEF%E6%98%AF%E5%B9%B3%E8%A1%8C%E5%9B%9B%E8%BE%B9%E5%BD%A2%EF%BC%9B%EF%BC%882%EF%BC%89%E5%BD%93%E2%88%A0B%E7%9A%84%E5%A4%A7%E5%B0%8F%E6%BB%A1%E8%B6%B3%E4%BB%80%E4%B9%88%E6%9D%A1%E4%BB%B6%E6%97%B6%2C%E5%9B%9B%E8%BE%B9%E5%BD%A2ACEF%E6%98%AF%E8%8F%B1%E5%BD%A2%3F%E8%AF%81%E6%98%8E%E4%BD%A0%E7%9A%84%E7%BB%93%E8%AE%BA.%EF%BC%88)
xWnF~D*jwyeV }љXq|ZO]D$JDd^IX-sgrCm\ml)
Ievd&l!ua=q\FA+rْ<=ImtL,PR\Q7V0$9(C
놦xGg+POE=ЃL/iJS0
{IpgF5J#5L%%EB!(h??0