初二下数学平行四边形题若平行四边形ABCD中,过A作AE⊥BC于E.AF⊥CD于F.若∠EAF=60°求:⑴∠B与∠C的度数.⑵若AE=2cm,AF=3cm,求平行四边形ABCD的面积.AF/AD=sinD=sin60=根号三/2是什么意思
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/12 12:21:41
![初二下数学平行四边形题若平行四边形ABCD中,过A作AE⊥BC于E.AF⊥CD于F.若∠EAF=60°求:⑴∠B与∠C的度数.⑵若AE=2cm,AF=3cm,求平行四边形ABCD的面积.AF/AD=sinD=sin60=根号三/2是什么意思](/uploads/image/z/4531124-20-4.jpg?t=%E5%88%9D%E4%BA%8C%E4%B8%8B%E6%95%B0%E5%AD%A6%E5%B9%B3%E8%A1%8C%E5%9B%9B%E8%BE%B9%E5%BD%A2%E9%A2%98%E8%8B%A5%E5%B9%B3%E8%A1%8C%E5%9B%9B%E8%BE%B9%E5%BD%A2ABCD%E4%B8%AD%2C%E8%BF%87A%E4%BD%9CAE%E2%8A%A5BC%E4%BA%8EE.AF%E2%8A%A5CD%E4%BA%8EF.%E8%8B%A5%E2%88%A0EAF%3D60%C2%B0%E6%B1%82%EF%BC%9A%E2%91%B4%E2%88%A0B%E4%B8%8E%E2%88%A0C%E7%9A%84%E5%BA%A6%E6%95%B0.%E2%91%B5%E8%8B%A5AE%3D2cm%2CAF%3D3cm%2C%E6%B1%82%E5%B9%B3%E8%A1%8C%E5%9B%9B%E8%BE%B9%E5%BD%A2ABCD%E7%9A%84%E9%9D%A2%E7%A7%AF.AF%2FAD%3DsinD%3Dsin60%3D%E6%A0%B9%E5%8F%B7%E4%B8%89%2F2%E6%98%AF%E4%BB%80%E4%B9%88%E6%84%8F%E6%80%9D)
xSn@~(R/m^gm$/ {i$1uhiPKKDTIJģDxNJP$n\v7|ތ~ﮇ/N~}w~GgJwo9 ^r}p`Yۄ`vW憛!]k"-@! hGPsT -~wÝcVÕXߝYn|