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51问答网 > 用两个长是8厘米，宽是4厘米的长方形分别拼成一个长方形和一个正方形，它们的周长分别是多少厘米？

用两个长是8厘米，宽是4厘米的长方形分别拼成一个长方形和一个正方形，它们的周长分别是多少厘米？

2025-03-14 21:15:04

推荐回答（2个）

回答1：

拼成长方形的周长是：
（8+8+4）×2
=20×2
=40（厘米）；
拼成后正方形的周长是：
（4+4）×4
=8×4
=32（厘米）；
答：拼成后长方形的周长是40厘米，拼成后正方形的周长是32厘米．

回答2：

8+4×2=44cm44÷4等于40 32+2=34cm

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