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/etc/nginx/nginx.conf.用木条做成一个长方形框,长18厘米,宽15厘米,它的周长和面积各是多少?把它拉成一个平行四边形,周长和面积有什么变化?
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长方形的周长=（长+宽）×2=(18+15)×2=66(厘米)长方形的面积=长×宽=18×15=270（平方厘米）把它拉成一个平行四边形,周长不变（因为四边的长度不变）,面积减小（因为底长不变,高减小了）
为您推荐：
周长不变，面积变小
一个长方形框,长18厘米,宽15厘米。那么它的周长就是2*（18+15）=2*33=66（厘米）。或者写麻烦一些就是：18+15+18+15=66；或者写为2*18+2*15=66.面积就是18*15=270（平方厘米）。用手吊着角去拉它，就变成了【平行四边形】。周长自然【没有改变】。但是【它包容的地块小了】。也就是面积变小了。还有别的方法吗请问没有了。...
周长为18乘2+15乘2=66厘米。面积为18乘15=270平方厘米。拉成平行四边形后 周长不变，面积可以为小于270平方厘米，大于0平方厘米的任意值
请问还有别的方法吗
什么叫别的方法？
我们老师教我们有几种方法写几种，你的方法和我的一样
扫描下载二维码有一条长16米，你能否围出一个面积为15平方米的长方形？诺能，则长宽各是多少_百度知道The page is temporarily unavailable
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