细心观察所给图形,认真分析各式,然后回答问题:
,
;
,
;
,
;![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07096af3b99fd1cb11c31f19a2c6408e.png)
![](https://img.xkw.com/dksih/QBM/2023/1/5/3146297775087616/3146502183731200/STEM/10f6da76c8bb4fe9973a877550ff6eaa.png?resizew=241)
(1)请用含
(
是正整数)的等式表示上述变化规律;
(2)推算出
的长;
(3)求出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cefc35d4b3a49540b17469f8567a066.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4f48b72329a258cf2c82273574a208.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50c4c051cff7a46258bbaf24758ffaf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/554a870ba0c66752f89e00ae26cc7646.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/725d9db5e15b77df6d5fe8fb908c6ea1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51417ed5c9681fc9901174af61e2ec91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07096af3b99fd1cb11c31f19a2c6408e.png)
![](https://img.xkw.com/dksih/QBM/2023/1/5/3146297775087616/3146502183731200/STEM/10f6da76c8bb4fe9973a877550ff6eaa.png?resizew=241)
(1)请用含
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(2)推算出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fd5fc72a200a878fadf801e72d2c875.png)
(3)求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed48b4767ffa8ae878091acee06b555a.png)
22-23八年级下·全国·单元测试 查看更多[1]
(已下线)第17章 勾股定理(A卷·知识通关练) -【单元测试】2022-2023学年八年级数学下册分层训练AB卷(人教版)
更新时间:2023-01-05 22:37:59
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解答题-计算题
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适中
(0.65)
【推荐1】图1是2022年1月份的日历,用图2所示的“九方格”在图1中框住9个日期,并把其中被阴影方格覆盖的四个日期分别记为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/4/8ed5deec-6ca6-4cac-83d4-46633e3fd2ec.png?resizew=294)
(1)直接填空:
________
;(填“>”、“<”或“=”)
(2)
________,
________,
________(用含a的代数式分别表示);
(3)当图2在图1的不同位置时,代数式
的值是否为定值?若是,请求出它的值,若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c27a9af7db04a611063978a7990745e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/4/8ed5deec-6ca6-4cac-83d4-46633e3fd2ec.png?resizew=294)
(1)直接填空:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7c73b422d0e4889886da4dcfbad2a0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/980ab4deb9e7f2bc9288787f5243a4d2.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e9bb42376c12d7d21702ae8062b25a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c98c59cd4749afdd21e73529fc84323.png)
(3)当图2在图1的不同位置时,代数式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48d0e662cad9cbff161df446baa06865.png)
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解答题-计算题
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适中
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【推荐2】观察下列各式:
;
;
;
(1)填空:
______;
______.
(2)你发现的规律是______(用含
的式子表示).
(3)用以上的规律计算:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f725bf58e1df5a21eed840533a328ece.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0bbea24f1e12e309624d0b63978c7ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d5b50ab6e085c722f1d5c1791dd42f6.png)
(1)填空:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bccf2077b84970a4218912b6f6773570.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3574988a10d49ca78b289ad82faef618.png)
(2)你发现的规律是______(用含
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(3)用以上的规律计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e33043004d8bd25fabf6c8a9926cd019.png)
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解答题-问答题
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适中
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【推荐1】如图,在平面直角坐标系中,一次函数
的图象与反比例函数
的图象相交于第一,三象限内的
,
,与
轴交于点
.
(2)在
轴上找一点
使
最大,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98bd749faa31a3d813a575fb00f0da8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d258deae6f5bd738e9d9ab2297868bf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a4e06fd1742dde3a72acbb8831fe497.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cce327b0e40f4e63b007460b31b0bc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/956d46f50fc69b505d9545abfa156a32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/956d46f50fc69b505d9545abfa156a32.png)
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解答题-问答题
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适中
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【推荐2】猜想:如图①,在
中,点
是对角线
的中点,过点
的直线分别交
、
于点
、
.若
的面积是20,则四边形
的面积是______.
探究:如图②,在
中,
,对角线
、
相交于点
,过点
的直线分别交
、
于点
、
.若
,求四边形
的面积.
应用:如图③,在Rt
中,
,延长
到点
,使
,连结
.若
,则
的面积是______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
探究:如图②,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37cf73aef1d5c556802f6d51c5010101.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369eb8ad56da7dc1cdb7c43762be4bee.png)
应用:如图③,在Rt
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f213621229843639780aae87fa29584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2b0572bb7781481394e1145c7fc891d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
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