1 . 如图,在
中,
于点
.分别以
为边向外作正方形,得到较大的三个正方形的面积分别为
,那么最小的正方形面积为()
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/29/b8446390-08b5-4d1e-bcea-40ce1112cdb9.png?resizew=202)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5632257c8a02f4cd0989df545fdaa41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/148ebc1e587c6afc551bad2a7f2d44fb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/29/b8446390-08b5-4d1e-bcea-40ce1112cdb9.png?resizew=202)
A.5 | B.6 | C.7 | D.![]() |
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2 . 小明用
张正方形纸片摆成了如图所示的图形,图中空白处的三角形均为直角三角形,若正方形
,
,
的面积依次为
,
,
,则正方形
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/492b6d3883713fcaa8a4fdd87b87b480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/332e71982612ea86c28b9f2054b1045c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/459cc36d02d31815ba9f2d05e130e0cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2024-02-28更新
|
231次组卷
|
4卷引用:河南省郑州市金水区2023-2024学年八年级上学期期末数学试题
3 . 如图,
是
的高,分别以线段
为边向外作正方形,其中3个正方形的面积如图所示,则第四个正方形的面积为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1e1e31646126c42c74c62ec95eb15d0.png)
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2024-02-28更新
|
92次组卷
|
2卷引用:江苏省南通市崇川区2023-2024学年八年级上学期期末数学试题
4 . 如图,在
中,
.分别以
为直径作半圆,面积分别记为
,
,则
的值等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e54b9d1a9eca6b1d7e725f89989ce821.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e675a92cad72c65aa4071b9d9e226090.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4c21cbb1c2bcbcb8391ac5a879f2ae0.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5 . 勾股定理是人类最伟大的科学发现之一.如图1,以直角三角形
的各边为边分别向外作正方形,再把较小的两张正方形纸片按图2的方式放置在最大的正方形内,三个阴影部分面积分别记为
,
,
,若已知
,
,
,则两个较小正方形纸片的重叠部分(四边形
)的面积为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6899bf9cadae2ccdb14cbc87d4f280ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a41ee1f8d4b35e625e3421d2800cf3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0863cf59114f905e9ad3debc5572792.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c705ed1d40eb3d40ebadd05dbb645b73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/27/ce108b69-a83e-443b-a5ee-0c2fcc8afebe.png?resizew=247)
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6 . 勾股定理是人类最伟大的科学发明之一.如图1,以直角三角形
的各边为边分别向外作正方形,再把较小的两张正方形纸片按图2的方式放置在最大的正方形内,三个阴影部分面积分别记为
,
,
,若已知
,
,
,则两个较小正方形纸片的重叠部分(四边形
)的面积为( )
![](https://img.xkw.com/dksih/QBM/2024/2/1/3423784433950720/3441496835047424/STEM/c712d7f40b83413e83ae2aef0dd2cd18.png?resizew=291)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6899bf9cadae2ccdb14cbc87d4f280ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c752ebe8516e7d3327f3410473d9a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0863cf59114f905e9ad3debc5572792.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ccdc17b603871d20843ffccca2df0ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://img.xkw.com/dksih/QBM/2024/2/1/3423784433950720/3441496835047424/STEM/c712d7f40b83413e83ae2aef0dd2cd18.png?resizew=291)
A.7 | B.10 | C.11 | D.13 |
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7 . 三个正方形的面积如图,中间三角形为直角三角形,则正方形B的面积为( )
A.9 | B.144 | C.81 | D.12 |
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8 . 如图,
中,
,AB为边向外作正方形,面积分别为
,
,若
,
,则BC=________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7281b641656a5992abaafb4190ca9afc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daadcd54ede70b183d92857bc85cebf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389abe04a965f4f8c9c7a692b1db77f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0097f257192599e184a30646921cc8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7866e230ead335b6f8c3f0226fc60f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/088757f22ff12d3f817d86d8be416b98.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/24/eda33899-dbf9-48fd-ad59-c72d1c074ba1.png?resizew=172)
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9 . 有一个面积为1的正方形,经过一次“生长”后,在它的左右肩上生出两个小正方形(如图1),其中,三个正方形围成的三角形是直角三角形,再经过一次“生长”后,生出了
个正方形(如图2),如果按此规律继续“生长”下去,那么它将变得“枝繁叶茂”.在“生长”了
次后形成的图形中所有正方形的面积和是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0875d9cad7f9332984f2040a3dea6c60.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/24/17c874d7-118d-4df2-8b54-2d359d43e3c4.png?resizew=239)
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10 . 在我国汉代数学家赵爽为了证明勾股定理,创制了一幅“弦图”(如图1),后人称之为“赵爽弦图”,流传至今.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/23/90a86d0b-da97-4a5b-bf9e-14e4508c7636.png?resizew=517)
(1)勾股定理的证明,人们已经找到了400多种方法,请从图1,图2,图3的证明方法中任选一种来证明该定理.
(2)如图4所示,分别以直角三角形三边为直径作半圆,设图中两个月形图案(图中阴影部分)的面积分别为
,
,直角三角形面积为
,请判断
,
,
的关系并证明.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/23/90a86d0b-da97-4a5b-bf9e-14e4508c7636.png?resizew=517)
(1)勾股定理的证明,人们已经找到了400多种方法,请从图1,图2,图3的证明方法中任选一种来证明该定理.
(2)如图4所示,分别以直角三角形三边为直径作半圆,设图中两个月形图案(图中阴影部分)的面积分别为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6899bf9cadae2ccdb14cbc87d4f280ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6899bf9cadae2ccdb14cbc87d4f280ee.png)
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