1 . 如图,在
中,
平分
交
于点E,连接
,完成下列作图和填空.
平分
交
于点F,连接
(只保留作图痕迹,不写作法);
(2)证明:
.
证明:∵四边形
是平行四边形,
∴
,
,
∴
.
∵
平分
,
∴
.
∵
平分
,
∴
.
∴① .
∴
.
在△DOF和△BOE中,
,
∴
.
∴③ .
∴四边形
为平行四边形.
∴④ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/246a86f34603eaf2e6a948681b831b0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9d16fab0f52c8af5abba0bf19a06ea0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86d1125b47dec1c5e93143ee59ad862a.png)
证明:∵四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0866e1551b61074ca8e61261ecd1f9dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16aad38b43462ca7a8fb9bc9484ad3a0.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dab1b5982c0ff238491c203982180c75.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/246a86f34603eaf2e6a948681b831b0d.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66f420d808cae48e18469ec0f85504b.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9d16fab0f52c8af5abba0bf19a06ea0.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ed71c45e03aa884ac2c8005151cfc9c.png)
∴① .
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a2612c3ed33135b60b5a08c173c9f84.png)
在△DOF和△BOE中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad4756c92431af1d2cff0a4cbe46ed20.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d3353ba3a28ed00e630e8417c57201e.png)
∴③ .
∴四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2330c01a4d2b5b20f106e3e48834d5c0.png)
∴④ .
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2 . 如图,在平行四边形
中,连接对角线
,
于点E,交
于点G.
的垂线,交
于点F,交
于点H;(不写作法,保留作图痕迹)
(2)在(1)所作的图形中,求证:
.(请补全下面的证明过程)
证明:∵四边形
是平行四边形,
∴
,
,∴
① .
∵
,∴
.
∵
,∴
.
∵ ② ,
∴
,
,即 ③ ,
∴
,∴ ④ ,
∴
,∴
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e3f5dc11efe60b4fd9a13b1d6b83842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(2)在(1)所作的图形中,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98a15346cf93dc605b05f16bfa4eaa2c.png)
证明:∵四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d2530e7023b2345c651e8f53629ff1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acb663fe83b1f7e93e13d91cc6460f9c.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b62ce0cbffa4758c7a0e6fb7ca4d24e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecc88122db97e1b88448cdf0594168c3.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e3f5dc11efe60b4fd9a13b1d6b83842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1070d38d2fea1dc88c6eb31d320b763.png)
∵ ② ,
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58ac96920743ceb96bba967e157360a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce706c90a7d2fb52e4a0b1d0bf16b17f.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81361a23e8bfe6e42ca24c2a757750a3.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93255435df1aea4e1b60885d5454202e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98a15346cf93dc605b05f16bfa4eaa2c.png)
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12卷引用:重庆市巴蜀中学校2022-2023学年九年级下学期数学开学考试试题
重庆市巴蜀中学校2022-2023学年九年级下学期数学开学考试试题重庆市沙坪坝区第一中学校2022-2023学年九年级下学期3月月考数学试题重庆市沙坪坝区第一中学校2022-2023学年九年级下学期2月月考数学试题重庆市第一中学校2022-2023学年九年级下学期期阶段性消化作业(六) 数学试题(已下线)(重庆新中考题型模式10+8+8)黄金卷08-【赢在中考·黄金8卷】备战2023年中考数学全真模拟卷(重庆专用)(已下线)数学(重庆卷)-学易金卷:2023年中考考前押题密卷(含考试版、全解全析、参考答案、答题卡)(已下线)专题11 多边形与平行四边形-学易金卷:5年(2019-2023)中考1年模拟数学真题分项汇编(重庆专用)(已下线)专题25 尺规作图+补全证明过程(35道)-学易金卷:5年(2019-2023)中考1年模拟数学真题分项汇编(重庆专用)重庆市开州区文峰初中教育集团2023-2024学年九年级上学期第一次月考数学试题2023年重庆市中考押题卷(四)数学模拟预测题重庆市渝北区松树桥中学校2022-2023学年八年级下学期期中数学试题重庆市西南大学附属中学校2023-2024学年八年级下学期4月月考数学试题
3 . 如图,在正方形
中,点E在
上,连接
.
的垂线,分别与
,
交于点F,G;(不写作法和证明,保留作图痕迹)
(2)在(1)所作的图形中,求证∶
.(请补全下面的证明过程)
证明∶
∵四边形
是正方形,
∴
, ①
∵![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2ebb6fbc0bbca4d992647c2e4aa6380.png)
∵![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb91cb9a5a14169845d700fbd95890ac.png)
∴
②
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82884d001fab8721868967bb0cbb3ef9.png)
又∵![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2ebb6fbc0bbca4d992647c2e4aa6380.png)
∴
③
在
和
中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25cdbf2cf6cff39d14a09202994d269.png)
∴ ④![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192cdcb14a793afdf40a9ae377382779.png)
∴
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)在(1)所作的图形中,求证∶
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe220a8c1ff10bb18014c70d3e06bbd1.png)
证明∶
∵四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bce559fceb4731f8d4323410075a22b.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2ebb6fbc0bbca4d992647c2e4aa6380.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb91cb9a5a14169845d700fbd95890ac.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72d241dec20c547340d22924a818fa1.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82884d001fab8721868967bb0cbb3ef9.png)
又∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2ebb6fbc0bbca4d992647c2e4aa6380.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4af17b55fa474f0103a858c2604b093.png)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bc1b68f13fed987f5209197de7bc8b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25cdbf2cf6cff39d14a09202994d269.png)
∴ ④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192cdcb14a793afdf40a9ae377382779.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe220a8c1ff10bb18014c70d3e06bbd1.png)
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4 . 如图,在矩形
中,
平分
交
于点F,连接
.
的垂线,交
于点E;(保留作图痕迹,不写作法)
(2)小明同学准备在(1)问所作的图形中,求证
,他的证明思路是:利用矩形和角平分线的性质,证明三角形全等解决问题.请根据小明的思路完成下列填空:
证明:∵四边形
是矩形
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edfdb6569b68f48fc00e91b32d2476cf.png)
∵_____________________
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff18ccdeabaa1490861fd56df99a1ba0.png)
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74526f61452d1a7affa50f749d6d5910.png)
∴_____________________
∵![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c220eadc312101e2fb89dfe920f7b30d.png)
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2710d1ae999c3297ce2b89c93754a462.png)
∵![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac559a1a89bfb16e1c44cdd7ad2f2bbd.png)
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a68f71476e365d4c354bd1f6963d1065.png)
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090481f413f9c63d59bd5ea18123de46.png)
∵在
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
∴______________________
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2bb1888679a21e93238ba901fa0f63.png)
在
和
中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833215e32158024272d2cc8260cef0e7.png)
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40a46351ab6193b00971ac40d8d5151a.png)
∴
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)小明同学准备在(1)问所作的图形中,求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c55ee522f41c43253050e92b3c8de31.png)
证明:∵四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edfdb6569b68f48fc00e91b32d2476cf.png)
∵_____________________
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff18ccdeabaa1490861fd56df99a1ba0.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74526f61452d1a7affa50f749d6d5910.png)
∴_____________________
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c220eadc312101e2fb89dfe920f7b30d.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2710d1ae999c3297ce2b89c93754a462.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac559a1a89bfb16e1c44cdd7ad2f2bbd.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a68f71476e365d4c354bd1f6963d1065.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090481f413f9c63d59bd5ea18123de46.png)
∵在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/004104bafb5f30338123d4ea2b7fedde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
∴______________________
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2bb1888679a21e93238ba901fa0f63.png)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/004104bafb5f30338123d4ea2b7fedde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c384685fc5cc1bb112dc6a50ab394f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833215e32158024272d2cc8260cef0e7.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40a46351ab6193b00971ac40d8d5151a.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c55ee522f41c43253050e92b3c8de31.png)
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2024-04-12更新
|
155次组卷
|
4卷引用:2023年重庆市第一中学校中考二模数学试题
5 . 小明在探究等腰三角形“三线合一”定理时,他的思路是:作等腰
的底边
上的高
,然后证明
,从而得到
是底边上的中线及顶角的平分线.请根据小明的思路完成下面的作图与填空:
证明:过点A作
的垂线
,垂足为D.(尺规作图:只保留作图痕迹)
在
和
中,
∵
是等腰三角形,
∴①
______,
∴②______.
∵
,
∴③______,
∴
,
∴④______,
⑤______,
∴
是底边
上的中线及顶角
的平分线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/901d94b32038d99ef9e748f1fe2b8c55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
证明:过点A作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
∴①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26a46e7879436d532af3f4b6e258a81.png)
∴②______.
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
∴③______,
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/901d94b32038d99ef9e748f1fe2b8c55.png)
∴④______,
⑤______,
∴
![](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/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/7/6852d44b-091a-4dc5-ad9f-82b229674940.png?resizew=141)
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6 . 如图:正方形中,直线
经过点D,与
交于点E,
(1)用直尺和圆规作图:过点C作的垂线l2,垂足为G,交
于点F,(请保留作图痕迹,不要求写作图过程)
(2)同学们作图完成后,通过测量发现,并且推理论证了该结论,请你根据他们的推理论证过程完成以下证明:
如图:已知正方形中,
分别是直线
,直线
被一组对边截得的线段,当
时,求证:
.
证明:∵正方形,
,
,
,
,
∴②,
,
在和
中,
,③,
,
.
同学们进一步研究发现,一条直线被正方形的一组对边所截得的线段与另一条直线被正方形的另一组对边所截得的线段垂直时均具备此特征,请你依据题目中的相关描述,完成下列命题:两条直线分别被正方形的一组对边所截,若所截得的线段④.
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名校
7 . 如图,在矩形中,
(1)用尺规完成以下基本作图:在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4e92f48e9bfe12d145f7d2a2f0360d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(2)在(1)问所作的图形中,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fe6d389a6c448d92b79d89bc9e8489f.png)
证明:四边形
是矩形,
.
.
,
②,
.
在和
中,
,
,
④.
即
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8 . 如图,在正方形中,
为
、
的交点,
为直角三角形,
,
,若
,则正方形
的面积为( )
A.80 | B.88 | C.96 | D.104 |
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9 . 如图,在平行四边形
中,
是对角线.
的垂直平分线交
于点E,交
于点F,交
于点O(不写作法,保留作图痕迹,并标明字母);
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92034dd2bb9480b18709d01153467f8f.png)
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2024-03-22更新
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111次组卷
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15卷引用:重庆一中2021-2022学年九年级上学期数学入学测试试题
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10 . 如如图,菱形
的对角线
、
相交于点
,过点
作直线
分别与
、
相交于
、
两点,若
,
,则图中阴影部分的面积等于______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.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/addb8e20db1fbb40f17dea52f951b907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eb3d1070981fed5ca65a34bb2282e6f.png)
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