1.已知一道堤坝的截面,为梯形,上底(CD)‖下底(AB),∠B=45°,AB=40m,CD=20m,CB=21m,求此堤坝的截面面积.2.将一根长30cm的细木棒放入长、宽、高分别为8cm、6cm、24cm的长方体无盖盒子中,那么细木棒
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/27 13:54:37
![1.已知一道堤坝的截面,为梯形,上底(CD)‖下底(AB),∠B=45°,AB=40m,CD=20m,CB=21m,求此堤坝的截面面积.2.将一根长30cm的细木棒放入长、宽、高分别为8cm、6cm、24cm的长方体无盖盒子中,那么细木棒](/uploads/image/z/7161041-65-1.jpg?t=1.%E5%B7%B2%E7%9F%A5%E4%B8%80%E9%81%93%E5%A0%A4%E5%9D%9D%E7%9A%84%E6%88%AA%E9%9D%A2%2C%E4%B8%BA%E6%A2%AF%E5%BD%A2%2C%E4%B8%8A%E5%BA%95%EF%BC%88CD%EF%BC%89%E2%80%96%E4%B8%8B%E5%BA%95%EF%BC%88AB%EF%BC%89%2C%E2%88%A0B%3D45%C2%B0%2CAB%3D40m%2CCD%3D20m%2CCB%3D21m%2C%E6%B1%82%E6%AD%A4%E5%A0%A4%E5%9D%9D%E7%9A%84%E6%88%AA%E9%9D%A2%E9%9D%A2%E7%A7%AF.2.%E5%B0%86%E4%B8%80%E6%A0%B9%E9%95%BF30cm%E7%9A%84%E7%BB%86%E6%9C%A8%E6%A3%92%E6%94%BE%E5%85%A5%E9%95%BF%E3%80%81%E5%AE%BD%E3%80%81%E9%AB%98%E5%88%86%E5%88%AB%E4%B8%BA8cm%E3%80%816cm%E3%80%8124cm%E7%9A%84%E9%95%BF%E6%96%B9%E4%BD%93%E6%97%A0%E7%9B%96%E7%9B%92%E5%AD%90%E4%B8%AD%2C%E9%82%A3%E4%B9%88%E7%BB%86%E6%9C%A8%E6%A3%92)
xTR"W14Nm/5ZL/PA7SH<Y;c<'U9ks3ލ[TRd3KtݾqڠQ^Sԇ8ֻAaZEU L3ncu <~f<5ߨ߷Ay7فq4Df}%-NͯG`sBDC#S1ip@){ٱ3=~wxKŏTjqb,_# jty-IVP+XeE86d3B0I2sLQڻ`V`>j*[Q009I))5rfZu\<ЌľqVgG~L삨ʘ~NRYPB(Y$[X9]$ag$5AĖZ2;{Y3sAeiR)#GRThv #r w4GC1լ߱2m΅fe_WIq~Υ&zGA*N2I%vl4֭N