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如图,在平行四边形ABCD中,DE垂直于AB,点E在AB上,DE=AE=EB=a,求平行四边形的周长.
人气:300 ℃ 时间:2019-08-18 00:03:26
解答
显然AB=2a,
在直角三角形AED中,DE=AE=a,故AD=√2a
周长为2a+2√2a
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