简答题:如右图,在梯形ABCD中,点E、F分别是腰AB、CD上的点. (1)证明:如果E、F为中点时,有 EF=1/2(AD+B

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题目内容:
如右图,在梯形ABCD中,点E、F分别是腰AB、CD上的点.
(1)证明:如果E、F为中点时,有 EF=1/2(AD+BC);
(2)请写出(1)中命题的逆命题,并判断该逆命题是否成立,若成立,请给予证明;若不成立,请说明理由.
HWOCRTEMP_ROC150
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