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共找到 38 与BE=22 相关的结果,耗时14 ms
已知:如图,在梯形ABCD中,AD∥BC,∠ABC=90°,∠C=45°,BE⊥CD于点E,AD=1,CD=22.求:BE的长.
数学
(2005•闸北区一模)已知:如图,在△ABC中,AB=AC,∠BAC=90°,点D、E、F分别在BC、AB、AC边上,BD=DC,BE=AF,EF交AD于点G.(1)求证:DE=DF;(2)求证:△DEG∽△DCF;(3)如果AB=3BE,
BE=22
,求
其他
E相似的三角形的面积.
(2010•湖北模拟)如图,正方体ABCD-A1B1C1D1的棱长为1,线段B1D1上有两个动点E、F,且EF=22.现有如下四个结论:①AC⊥BE;②EF∥平面ABCD;③三棱锥A-BEF的体积为定值;④异面直线AE、BF所成的
其他
_.
22.We had no idea about the traffic accident you told us.A.until B.unless C.except that D.eve22.We had no idea about the traffic accid
其他
nt( ) you told
英语翻译1.April bought a rectangular fish tank that is 40 inches wide,65 inches long and 22 inches high.The pet store salesman said not to
英语
fill it comple
( )22.The doctor___for yet.A.isn’t sent B.hasn’t been sent C.won’t be sent D.wasn’t sent.
英语
For many young people完型填空 For many young people,becoming a professional athlete might seem like a dream job.21 you become a profession
英语
l athlete,you'
19. There are five _____________ (thousand) workers at that factory20. Three fifths population of this city _____________ (be) from ot
英语
er cities.21.
如图所示,正方体ABCD-A1B1C1D1的棱长为1,线段B1D1上有两个动点E,F,且EF=22,则下列结论中错误的是.①AC⊥BE;②EF∥平面ABCD;③三棱锥A-BEF的体积为定值;④异面直线AE,BF所成的角为
其他
在矩形ABCD中,AD=2AB,E为AD上一点,且BE=BC,则∠DCE=()A.10°B.15°C.22.5°D.30°
数学
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