菱形的周长为20CM,两邻角的比为1:3,则菱形的面积为?S=12.5根号2.在直角梯形ABCD中,AD20//BC,〈B=90度,且AD=4CM,AB=6CM,CD=10CM,若动点P从A点出发,以每秒1CM的速度沿线段AD向点D运动;动点Q从C点出发以每
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![菱形的周长为20CM,两邻角的比为1:3,则菱形的面积为?S=12.5根号2.在直角梯形ABCD中,AD20//BC,〈B=90度,且AD=4CM,AB=6CM,CD=10CM,若动点P从A点出发,以每秒1CM的速度沿线段AD向点D运动;动点Q从C点出发以每](/uploads/image/z/7012194-42-4.jpg?t=%E8%8F%B1%E5%BD%A2%E7%9A%84%E5%91%A8%E9%95%BF%E4%B8%BA20CM%2C%E4%B8%A4%E9%82%BB%E8%A7%92%E7%9A%84%E6%AF%94%E4%B8%BA1%EF%BC%9A3%2C%E5%88%99%E8%8F%B1%E5%BD%A2%E7%9A%84%E9%9D%A2%E7%A7%AF%E4%B8%BA%3FS%3D12.5%E6%A0%B9%E5%8F%B72.%E5%9C%A8%E7%9B%B4%E8%A7%92%E6%A2%AF%E5%BD%A2ABCD%E4%B8%AD%2CAD20%2F%2FBC%2C%E3%80%88B%3D90%E5%BA%A6%2C%E4%B8%94AD%3D4CM%2CAB%3D6CM%2CCD%3D10CM%2C%E8%8B%A5%E5%8A%A8%E7%82%B9P%E4%BB%8EA%E7%82%B9%E5%87%BA%E5%8F%91%2C%E4%BB%A5%E6%AF%8F%E7%A7%921CM%E7%9A%84%E9%80%9F%E5%BA%A6%E6%B2%BF%E7%BA%BF%E6%AE%B5AD%E5%90%91%E7%82%B9D%E8%BF%90%E5%8A%A8%EF%BC%9B%E5%8A%A8%E7%82%B9Q%E4%BB%8EC%E7%82%B9%E5%87%BA%E5%8F%91%E4%BB%A5%E6%AF%8F)
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