(2009•江西)如图1,在等腰梯形ABCD中,AD∥BC,E是AB的中点,过点E作EF∥BC交CD于点F.AB=4,BC=6,∠B=60度.(1)求点E到BC的距离;(2)点P为线段EF上的一个动点,过P作PM⊥EF交BC于点M,过M作MN∥AB交
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![(2009•江西)如图1,在等腰梯形ABCD中,AD∥BC,E是AB的中点,过点E作EF∥BC交CD于点F.AB=4,BC=6,∠B=60度.(1)求点E到BC的距离;(2)点P为线段EF上的一个动点,过P作PM⊥EF交BC于点M,过M作MN∥AB交](/uploads/image/z/1598601-57-1.jpg?t=%EF%BC%882009%26%238226%3B%E6%B1%9F%E8%A5%BF%EF%BC%89%E5%A6%82%E5%9B%BE1%2C%E5%9C%A8%E7%AD%89%E8%85%B0%E6%A2%AF%E5%BD%A2ABCD%E4%B8%AD%2CAD%E2%88%A5BC%2CE%E6%98%AFAB%E7%9A%84%E4%B8%AD%E7%82%B9%2C%E8%BF%87%E7%82%B9E%E4%BD%9CEF%E2%88%A5BC%E4%BA%A4CD%E4%BA%8E%E7%82%B9F%EF%BC%8EAB%3D4%2CBC%3D6%2C%E2%88%A0B%3D60%E5%BA%A6%EF%BC%8E%EF%BC%881%EF%BC%89%E6%B1%82%E7%82%B9E%E5%88%B0BC%E7%9A%84%E8%B7%9D%E7%A6%BB%EF%BC%9B%EF%BC%882%EF%BC%89%E7%82%B9P%E4%B8%BA%E7%BA%BF%E6%AE%B5EF%E4%B8%8A%E7%9A%84%E4%B8%80%E4%B8%AA%E5%8A%A8%E7%82%B9%2C%E8%BF%87P%E4%BD%9CPM%E2%8A%A5EF%E4%BA%A4BC%E4%BA%8E%E7%82%B9M%2C%E8%BF%87M%E4%BD%9CMN%E2%88%A5AB%E4%BA%A4)
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