下列命题中,是假命题的是( )
A.一组对边平行,一组对角相等的四边形是平行四边形 |
B.一组对边平行,另一组对边相等的四边形是平行四边形 |
C.一组对边平行,一条对角线平分另一条对角线的四边形是平行四边形 |
D.一组对边平行,一组对角的角平分线平行的四边形是平行四边形 |
21-22八年级下·陕西西安·期末 查看更多[3]
陕西省西安市铁一中2021-2022学年八年级下学期期末数学试题陕西省西安市雁塔区西安铁一中2021-2022学年八年级下学期期末数学试题(已下线)专题06 平行四边形(13大题型)【好题汇编】-备战2023-2024学年八年级数学下学期期末真题分类汇编(陕西专用)
更新时间:2023-10-07 00:09:26
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【推荐1】如图,如果
,
,则下列结论正确的个数为( )
(1)
;(2)
;(3)
平分![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
(4)
(5)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3ff64620854619a093859b6074b48f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e53497af8899cb299d762f1a4f46a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/666f1863110a938b4b09ebad9bf8a5af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fc4d1df2ffbacb38e78bd7d874fea08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/108e91efce69c6d0b37b2731364f70e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3ff64620854619a093859b6074b48f6.png)
A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐2】如图,E是AB上一点,F是DC上一点,G是BC延长线上一点,①如果∠B=∠DCG,则AB∥DC;②如果∠D=∠DCG,则EF∥BC;③如果∠D+∠DFE=180°,则EF∥BC;④如果EF∥BC,则∠A+∠B=180°.四个结论中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/6e0819a5-2ac3-47f1-be12-2948c9246312.png?resizew=186)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/6e0819a5-2ac3-47f1-be12-2948c9246312.png?resizew=186)
A.① | B.①② | C.①②③ | D.①④ |
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【推荐1】如图,在正方形
中,
,
,
,
,垂足分别是
,
,连接
,若
,正方形
与正方形
的面积之比为
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c627c657d0139d1c7cc99ddb83f1a09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/063b97b04842da4fe4098706f5abcea4.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39d8fe9a516c89a9939a01350eaf7ed7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48dbcee0a8db094aabd22e1ff3a50f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e41d4de39daabc2601bf96a9801e8bae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8470182e3a1b46a1e48f02a4f098d688.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
A.4 | B.3 | C.2.5 | D.2 |
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【推荐2】如图,在
中,
,点
在
边上,
,
交
于点
.若点
是
边的中点,
,
,则四边形
的面积等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cccde778c619848076ea8c11b0b13a12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/25/79b9b129-42a9-40ed-a7e4-34188232aae4.png?resizew=193)
A.12 | B.14 | C.24 | D.48 |
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名校
【推荐1】下列命题是真命题的是( )
A.对角线相等的四边形是平行四边形 | B.对角线互相平分且相等的四边形是平行四边形 |
C.对角线互相平分的四边形是平行四边形 | D.对角线互相垂直的四边形是平行四边形 |
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【推荐2】如图,在矩形
中,E,F分别是
,
中点,连接
,
,
,
分别交于点M,N,四边形
是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/12/bdaf522e-ef34-4d02-8420-9b330eac56da.png?resizew=147)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05a270ec7e23fc0cc1d4b04bf1d22184.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/12/bdaf522e-ef34-4d02-8420-9b330eac56da.png?resizew=147)
A.正方形 | B.菱形 | C.矩形 | D.无法确定 |
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【推荐1】下列四个命题中是真命题的有( )
①对角线相等的平行四边形是矩形;
②对角线互相垂直的平行四边形是菱形;
③四角相等且两边相等的四边形是正方形;
④对角线和一边的夹角是45°的菱形是正方形.
①对角线相等的平行四边形是矩形;
②对角线互相垂直的平行四边形是菱形;
③四角相等且两边相等的四边形是正方形;
④对角线和一边的夹角是45°的菱形是正方形.
A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐2】下列命题中,真命题是( )
A.圆周角等于圆心角的一半 | B.等弧所对的圆周角相等 |
C.垂直于半径的直线是圆的切线 | D.过弦的中点的直线必经过圆心 |
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