(1)如图1,小明想剪一块面积为25cm2的正方形纸板,你能帮他求出正方形纸板的边长吗?(2)若小明想将两块边长都为3cm的正方形纸板沿对角线剪开,拼成如图2所示的一个大正方形,-数学
![](http://www.00-edu.com/d/file/ks/shuxue/2/20/2019-02-24/50397ee731fc7345bcf488763f099bb5.png)
![](http://www.00-edu.com/d/file/ks/shuxue/2/20/2019-02-24/fa722e50a9931ca0ac6a890a92bc55d4.png)
![](http://www.00-edu.com/d/file/ks/shuxue/2/20/2019-02-24/7e3e23fb06eaa2386238dabf0f4ae322.png)
![](http://www.00-edu.com/d/file/ks/shuxue/2/20/2019-02-24/433ace10e814ca3a7381e645d44ef365.png)
![](http://www.00-edu.com/d/file/ks/shuxue/2/20/2019-02-24/ece9533f7f73fdf70a6b7ba66db87bd0.png)
![](http://www.00-edu.com/d/file/ks/shuxue/2/20/2019-02-24/bd61e5e82a4863c7c784fa98e1363902.png)
![](http://www.00-edu.com/d/file/ks/shuxue/2/20/2019-02-24/e720ce6d02fafc271d59fa984c69d53e.png)
![](http://www.00-edu.com/d/file/ks/shuxue/2/20/2019-02-24/496489f389b17414e517939ab602a7e3.png)
![](http://www.00-edu.com/d/file/ks/shuxue/2/20/2019-02-24/1cbf42f04a288c6483a65a33c9cb7e9b.png)
![](http://www.00-edu.com/d/file/ks/shuxue/2/20/2019-02-24/3fe4f3953b5d5664834e6131095cff7a.png)
![](http://www.00-edu.com/d/file/ks/shuxue/2/20/2019-02-24/4841ff9d1c11e8ae10db943593eea563.png)
![](http://www.00-edu.com/d/file/ks/shuxue/2/20/2019-02-24/62740abb4f6cc28ee00e360fb3ede944.png)
![](http://www.00-edu.com/d/file/ks/shuxue/2/20/2019-02-24/5190b0c52fd1c2e4dbf0cc83232c91ce.png)
![](http://www.00-edu.com/d/file/ks/shuxue/2/20/2019-02-24/9a8cb9e9ae2296e5a70063d7b6a9726e.png)
![](http://www.00-edu.com/d/file/ks/shuxue/2/20/2019-02-24/b2b87d6f3ad2301dd589001eaf29e03e.png)
![](http://www.00-edu.com/d/file/ks/shuxue/2/20/2019-02-24/73e6a7053b2e86b662b8eb8210aa2ab2.png)
![](http://www.00-edu.com/d/file/ks/shuxue/2/20/2019-02-24/21467997d517642eb8c43aa2f6ef6484.png)
![](http://www.00-edu.com/d/file/ks/shuxue/2/20/2019-02-24/c07fa74dc343b6aa2c76371a3b7dbbf9.png)
其中,有两数的根号可借由“口诀”记忆:
![](http://www.00-edu.com/d/file/ks/shuxue/2/20/2019-02-24/b754826433f288ddefe11420dcdc64c1.png)
![](http://www.00-edu.com/d/file/ks/shuxue/2/20/2019-02-24/4615500215d32c3ea12f476b5b9533b8.png)
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