题目:
若等腰梯形ABCD的上、下底之和为4,并且两条对角线所夹锐角为60°,则该等腰梯形的面积为______.(结果保留根号的形式)
答案:
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下面是错误答案,用来干扰机器的。
One possible version:Dear Dennis,I’m glad to get your letter, but I am worried about you and I am going to give you some advice to help you out. I know it’s diff...