如图,四边形ABCD为平行四边形,作∠BAD的平分线,交DC边于点E,若∠DEA=30°,则∠B的度数为( )
A.100° | B.120° | C.135° | D.150° |
17-18八年级下·湖北·课后作业 查看更多[5]
新人教版数学八年级下册第十八章平行四边形18.1.1《平行四边形的性质》课时练习(已下线)考点16 多边形与平行四边形《备战2020年中考核心考点清单》辽宁省大连市普兰店区2021-2022学年八年级下学期期中数学试题湖南省长沙市湖南师大附中星沙实验学校2020-2021学年八年级下学期第一次月考数学试题18.1.1平行四边形的性质 课后作业C层
更新时间:2022-08-17 20:04:19
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【推荐1】如图,直线
直线
分别与
,
交于点
,
,
,且与
的平分线交于
,若
,则
的度数是( )
![](https://img.xkw.com/dksih/QBM/2020/5/10/2459955063275520/2460527012192256/STEM/87ca41f5-1c63-4beb-be77-ff49d95b4c33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9df6516469b4f88f5caf721f09dfd3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2ee75a234ac05a3225e49ddd8c5065.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0b65ca62ce90b4879f58884e826c669.png)
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A.35° | B.30° | C.55° | D.20° |
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【推荐2】如图,在
中,以点
为圆心,适当长为半径作弧,分别交
、
于点
、
,再分别以点
、
为圆心,以大于
的长为半径作弧,两弧交于点
,作
交
于点
.若
,
,且
为边
的中点,则
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
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A.3 | B.![]() | C.5 | D.7 |
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【推荐1】下列命题中,是假命题的是( )
A.平行四边形的对角相等 |
B.在同一个圆内,圆周角等于圆心角的一半 |
C.反比例函数的图象与坐标轴没有交点 |
D.0的立方根是0 |
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【推荐2】如图,在平行四边形ABCD中,AB<AD,∠D=30°,CD=4,以AB为直径的⊙O交BC于点E,则阴影部分的面积为( )
![](https://img.xkw.com/dksih/QBM/2022/2/21/2921333555027968/2922105302138880/STEM/03b3b114-5220-4890-a72c-d75a9c9e4c50.png?resizew=222)
![](https://img.xkw.com/dksih/QBM/2022/2/21/2921333555027968/2922105302138880/STEM/03b3b114-5220-4890-a72c-d75a9c9e4c50.png?resizew=222)
A.![]() | B.![]() | C.3![]() | D.2 |
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