配套习题- 一元二次方程的应用——面积问题 -【青果学院】

挑战习题

1/5单选题

难度：

1.如图为一张方格纸，纸上有一灰色三角形，其顶点均位于某两网格线的交点上，若灰色三角形面积为

平方公分，则此方格纸的面积为多少平方公分？（　　）

A	11
B	12
C	13
D	14

提示1：: IOWPr+iuvuaWueagvOe6uOeahOi+uemVv+aYr3jvvIzngbDoibLkuInop5LlvaLnmoTpnaLnp6/nrYnkuo7mlrnmoLznurjnmoTpnaLnp6/lh4/ljrvlkajlm7TkuInkuKrnm7Top5LkuInop5LlvaLnmoTpnaLnp6/vvIzliJflh7rmlrnnqIvlj6/msYLop6Mu

正确答案：Qg==

6Kej77ya5pa55qC857q455qE6L656ZW/5piveO+8jDxicj54PHN1cD4yPC9zdXA+LTxpbWcgd2lkdGg9MTg5IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzBELzI3L3JCQUNGRlBJOWtpRGhQdE1BQUFDakFVU1BkNDU2NS5wbmciPj08aW1nIHdpZHRoPTEyIGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzRBLzNCL3JCQUNFMVBJOWtmUkpUbmxBQUFCV2hBREhWZzM3MC5wbmciPjxicj54PHN1cD4yPC9zdXA+PTEyLiA8YnI+5omA5Lul5pa55qC857q455qE6Z2i56ev5pivMTLvvIw8YnI+5pWF6YCJQi4gPGJyPg==

提示0/1

查看答案

提交

2/5单选题

难度：

如图，在宽为20米，长为30米的矩形地面上修建两条同样宽的道路，余下部分作为耕地. 若耕地面积需要551米²，则修建的路宽应为（　　）

A	1米
B	1.5米
C	2米
D	2.5米

提示1：: PHA+6KaB5rGC5L+u5bu655qE6Lev5a6977yM5bCx6KaB6K6+5L+u5bu655qE6Lev5a695bqU5Li6eOexs++8jOagueaNrumimOaEj+WPr+efpe+8muefqeW9ouWcsOmdoi3miYDkv67ot6/pnaLnp6896ICV5Zyw6Z2i56ev77yM5L6d5q2k5YiX5Ye6562J6YeP5YWz57O76Kej5pa556iL5Y2z5Y+vLjwvcD4=

正确答案：QQ==

PHA+6Kej77ya6K6+5L+u5bu655qE6Lev5a695bqU5Li6eOexszxicj7moLnmja7nrYnph4/lhbPns7vliJfmlrnnqIvlvpfvvJoyMMOXMzAt77yIMjB4KzMweC14PHN1cD4yPC9zdXA+77yJPTU1Me+8jDxicj7op6PlvpfvvJp4PTQ55oiWMe+8jDxicj40OeS4jeWQiOmimOaEj++8jOiIjeWOu++8jDxicj7mlYXpgIlBLjwvcD4=

提示0/1

查看答案

提交

3/5单选题

难度：

如图，矩形ABCD的周长是20cm，以AB，AD为边向外作正方形ABEF和正方形ADGH，若正方形ABEF和ADGH的面积之和68cm²，那么矩形ABCD的面积是（）

A	21cm²
B	16cm²
C	24cm²
D	9cm²

提示1：: PHA+5pys6aKY5Y+v6K6+QUI9eGNt77yMQUQ977yIMTAteO+8iWNt77yM5YiZ5q2j5pa55b2iQUJFRueahOmdouenr+S4ung8c3VwPjI8L3N1cD5jbTxzdXA+Mjwvc3VwPu+8jOato+aWueW9okFER0jnmoTpnaLnp6/kuLrvvIgxMC1477yJPHN1cD4yPC9zdXA+Y208c3VwPjI8L3N1cD7vvIzov5vogIznu5PlkIjpopjmhI/vvIzlj6/liJflh7rmlrnnqIvvvIzmsYLlvpfnrZTmoYguPC9wPg==

正确答案：Qg==

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

提示0/1

查看答案

提交

4/5单选题

难度：

4.从正方形铁片上截去一个宽为3cm（长与正方形的边长相等）的矩形铁片，剩余面积为130cm²，则原来铁片的面积为（　　）

A	169cm²
B	256cm²
C	225cm²
D	196cm²

提示1：: IOiuvuWOn+ato+aWueW9oueahOi+uemVv+S4unjvvIzpgqPkuYjmiKrljrvnmoTnn6nlvaLnmoTplb/kuLp477yM5omA5Lul5oiq5Y6755qE55+p5b2i55qE6Z2i56ev5Li6M3jvvIzliKnnlKjmraPmlrnlvaLnmoTpnaLnp6/lhazlvI/lkozliankvZnpnaLnp6/kuLoxMzBjbTxzdXA+Mjwvc3VwPuWwseWPr+S7peWIl+WHuuaWueeoi++8jOino+aWueeoi+WNs+WPry4=

正确答案：QQ==

6Kej77ya6K6+5Y6f5q2j5pa55b2i55qE6L656ZW/5Li6eO+8jOmCo+S5iOaIquWOu+eahOefqeW9oueahOmVv+S4unjvvIw8YnI+5L6d6aKY5oSP5b6XeDxzdXA+Mjwvc3VwPi0zeD0xMzDvvIw8YnI+4oi0eDxzdXA+Mjwvc3VwPi0zeC0xMzA9MO+8jDxicj7iiLR4PHN1Yj4xPC9zdWI+PTEz77yMeDxzdWI+Mjwvc3ViPj0tMTDvvIjotJ/lgLzoiI3ljrvvvIkuIDxicj7iiLTljp/mnaXpk4HniYfnmoTpnaLnp6/kuLoxM8OXMTM9MTY5Y208c3VwPjI8L3N1cD4uIDxicj7mlYXpgIlBLiA=

提示0/1

查看答案

提交

5/5单选题

难度：

5.如图，在宽为20米、长为32米的矩形地面上修筑同样宽的道路（图中阴影部分），余下部分种植草坪. 要使草坪的面积为540平方米，则道路的宽为（　　）

A	5米
B	3米
C	2米
D	2米或5米

提示1：: IOiuvumBk+i3r+eahOWuveS4unjvvIzliKnnlKjigJzpgZPot6/nmoTpnaLnp6/igJ3kvZzkuLrnm7jnrYnlhbPns7vlj6/liJfmlrnnqIsyMHgrMzJ4LXg8c3VwPjI8L3N1cD49MjDDlzMyLTU0MO+8jOino+aWueeoi+WNs+WPr+axguinoy4g6Kej6aKY6L+H56iL5Lit6KaB5qC55o2u5a6e6ZmF5oSP5LmJ6L+b6KGMeOeahOWAvOeahOWPluiIjS4=

正确答案：Qw==

6Kej77ya6K6+6YGT6Lev55qE5a695Li6eO+8jOagueaNrumimOaEj+W+lzIweCszMngteDxzdXA+Mjwvc3VwPj0yMMOXMzItNTQwPGJyPuaVtOeQhuW+l++8iHgtMjbvvIk8c3VwPjI8L3N1cD49NTc2PGJyPuW8gOaWueW+l3gtMjY9MjTmiJZ4LTI2PS0yNDxicj7op6Plvpd4PTUw77yI6IiN5Y6777yJ5oiWeD0yPGJyPuaJgOS7pemBk+i3r+WuveS4ujLnsbMuIDxicj7mlYXpgIlDLiA=

提示0/1

查看答案

提交