湖北孝感市汉川市2026-2027学年八年级上学期11月期中质量监测数学试卷

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2026—2027学年度上学期期中质量监测

八年级数学试卷

温馨提示:

1.答题前,考生务必将自己所在县(市、区)、学校、姓名、考号填写在试卷上指定的位置.

2.选择题选出答案后,用2B铅笔把答题卡上对应题目的答案标号涂黑;非选择题的答案必须写在答题卡的指定位置,在本卷上答题无效.

3.本试卷满分120分,考试时间120分钟.

一、精心选一选,相信自己的判断!(本大题共10小题,每小题3分,共30分.在每小题给出的四个选项中只有一项是符合题目要求的,不涂、错涂或涂的代号超过一个,一律得0分)

1.在一些汉字的美术字中,有的是轴对称图形,下面四个美术字中,可以看作轴对称图形的是

A. B. C. D.

2.下列长度的线段能组成三角形的是

A.,, B.,,

C.,, D.,,

3.如图,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的度数为

A. B. C. D.

4.如图,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,则与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相等的角是

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5.如图,将一等边三角形剪去一个角后,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等于

A. B. C. D.

6.如图,已知点,,,在同一直线上,且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,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,所添加的条件中,仍无法判定eqWmf183GmgAAAAAAAOAJwAEBCQAAAAAwVgEACQAAA94BAAACAKMAAAAAAAUAAAACAQEAAAAFAAAAAQL///8ABQAAAC4BGQAAAAUAAAALAgAAAAAFAAAADALAAeAJCwAAACYGDwAMAE1hdGhUeXBlAAAwABIAAAAmBg8AGgD/////AAAQAAAAwP///8X///+gCQAAhQEAAAUAAAAJAgAAAAIFAAAAFAJgATIAHAAAAPsCgP4AAAAAAACQAQAAAKEAAgAQVGltZXMgTmV3IFJvbWFuAFjVjwDA7I92iJCVdosLkHYEAAAALQEAAAkAAAAyCgAAAAABAAAAxABmBRwAAAD7AoD+AAAAAAAAkAEAAAChAAIAEFRpbWVzIE5ldyBSb21hbgBY1Y8AwOyPdoiQlXaLC5B2BAAAAC0BAQAEAAAA8AEAAAkAAAAyCgAAAAABAAAAxAAAAwUAAAAUAmABJwEcAAAA+wKA/gAAAAAAAJABAQAAAAACABBUaW1lcyBOZXcgUm9tYW4AWNWPAMDsj3aIkJV2iwuQdgQAAAAtAQAABAAAAPABAQAQAAAAMgoAAAAABgAAAEFCQ0RFRusA6wCQAxYB6wAAAwUAAAAUAmABbgQcAAAA+wKA/gAAAAAAAJABAAAAAQACABBTeW1ib2wAdnbCkXZAAAAAWNWPAMDsj3aIkJV2iwuQdgQAAAAtAQEABAAAAPABAAAJAAAAMgoAAAAAAQAAAEAAAAOjAAAAJgYPADsBQXBwc01GQ0MBABQBAAAUAQAARGVzaWduIFNjaWVuY2UsIEluYy4ABQEABwREU01UNwABE1dpbkFsbEJhc2ljQ29kZVBhZ2VzABEFVGltZXMgTmV3IFJvbWFuABEDU3ltYm9sABEFQ291cmllciBOZXcAEQRNVCBFeHRyYQATV2luQWxsQ29kZVBhZ2VzABEGy87M5QASAAghLyfyXyGPIS9HX0FQ8h8eQVD0FQ9BAPRF9CX0j0JfQQD0EA9DX0EA8h8gpfIKJfSPIfQQD0EA9A9I9Bf0j0EA8hpfRF9F9F9F9F9BDwwBAAEAAQICAgIAAgABAQEAAwABAAQABQAKAQAQAAAAAAAAAA8BAgCBlAMCAINBAAIAg0IAAgCDQwACBIZFIkACAIGUAwIAg0QAAgCDRQACAINGAAAAAAoAAAAmBg8ACgD/////AQAAAAAAHAAAAPsCFAAJAAAAAAC8AgAAAIYBAgIiU3lzdGVtAHZ/CIooAAAKAAYAAAA3KmYPfwiKKIsLkHYEAAAALQEAAAQAAADwAQEAAwAAAAAA的是

A.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 B.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 C.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 D.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

7.如图所示的网格由边长相同的小正方形组成,点、、、、、、在小正方形的顶点上,则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的重心是

A.点 B.点 C.点 D.点

8.如图,在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中,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,用尺规作图作出射线,射线交于点,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,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,为边上的一个动点,则的值不可能为

A.5 B.6 C.8 D.10

9.如图,在eqWmf183GmgAAAAAAAGAEwAECCQAAAACzWwEACQAAA24BAAACAJYAAAAAAAUAAAACAQEAAAAFAAAAAQL///8ABQAAAC4BGQAAAAUAAAALAgAAAAAFAAAADALAAWAECwAAACYGDwAMAE1hdGhUeXBlAAAwABIAAAAmBg8AGgD/////AAAQAAAAwP///8X///8gBAAAhQEAAAUAAAAJAgAAAAIFAAAAFAJgATIAHAAAAPsCgP4AAAAAAACQAQAAAKEAAgAQVGltZXMgTmV3IFJvbWFuAFjVjwDA7I92iJCVdosLkHYEAAAALQEAAAkAAAAyCgAAAAABAAAAxAAAAwUAAAAUAmABJwEcAAAA+wKA/gAAAAAAAJABAQAAAAACABBUaW1lcyBOZXcgUm9tYW4AWNWPAMDsj3aIkJV2iwuQdgQAAAAtAQEABAAAAPABAAAMAAAAMgoAAAAAAwAAAEFCQwDrAOsAAAOWAAAAJgYPACEBQXBwc01GQ0MBAPoAAAD6AAAARGVzaWduIFNjaWVuY2UsIEluYy4ABQEABwREU01UNwABE1dpbkFsbEJhc2ljQ29kZVBhZ2VzABEFVGltZXMgTmV3IFJvbWFuABEDU3ltYm9sABEFQ291cmllciBOZXcAEQRNVCBFeHRyYQATV2luQWxsQ29kZVBhZ2VzABEGy87M5QASAAghLyfyXyGPIS9HX0FQ8h8eQVD0FQ9BAPRF9CX0j0JfQQD0EA9DX0EA8h8gpfIKJfSPIfQQD0EA9A9I9Bf0j0EA8hpfRF9F9F9F9F9BDwwBAAEAAQICAgIAAgABAQEAAwABAAQABQAKAQAQAAAAAAAAAA8BAgCBlAMCAINBAAIAg0IAAgCDQwAAAAAKAAAAJgYPAAoA/////wEAAAAAABwAAAD7AhQACQAAAAAAvAIAAACGAQICIlN5c3RlbQB2fwiKKAAACgAGAAAAXipmu38IiiiLC5B2BAAAAC0BAAAEAAAA8AEBAAMAAAAAAA==中,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,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,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交于点,若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number 1

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A.12 B.10 C.8 D.6

10.已知,如图,eqWmf183GmgAAAAAAAGAEwAECCQAAAACzWwEACQAAA24BAAACAJYAAAAAAAUAAAACAQEAAAAFAAAAAQL///8ABQAAAC4BGQAAAAUAAAALAgAAAAAFAAAADALAAWAECwAAACYGDwAMAE1hdGhUeXBlAAAwABIAAAAmBg8AGgD/////AAAQAAAAwP///8X///8gBAAAhQEAAAUAAAAJAgAAAAIFAAAAFAJgATIAHAAAAPsCgP4AAAAAAACQAQAAAKEAAgAQVGltZXMgTmV3IFJvbWFuAFjVjwDA7I92iJCVdosLkHYEAAAALQEAAAkAAAAyCgAAAAABAAAAxAAAAwUAAAAUAmABJwEcAAAA+wKA/gAAAAAAAJABAQAAAAACABBUaW1lcyBOZXcgUm9tYW4AWNWPAMDsj3aIkJV2iwuQdgQAAAAtAQEABAAAAPABAAAMAAAAMgoAAAAAAwAAAEFCQwDrAOsAAAOWAAAAJgYPACEBQXBwc01GQ0MBAPoAAAD6AAAARGVzaWduIFNjaWVuY2UsIEluYy4ABQEABwREU01UNwABE1dpbkFsbEJhc2ljQ29kZVBhZ2VzABEFVGltZXMgTmV3IFJvbWFuABEDU3ltYm9sABEFQ291cmllciBOZXcAEQRNVCBFeHRyYQATV2luQWxsQ29kZVBhZ2VzABEGy87M5QASAAghLyfyXyGPIS9HX0FQ8h8eQVD0FQ9BAPRF9CX0j0JfQQD0EA9DX0EA8h8gpfIKJfSPIfQQD0EA9A9I9Bf0j0EA8hpfRF9F9F9F9F9BDwwBAAEAAQICAgIAAgABAQEAAwABAAQABQAKAQAQAAAAAAAAAA8BAgCBlAMCAINBAAIAg0IAAgCDQwAAAAAKAAAAJgYPAAoA/////wEAAAAAABwAAAD7AhQACQAAAAAAvAIAAACGAQICIlN5c3RlbQB2fwiKKAAACgAGAAAAXipmu38IiiiLC5B2BAAAAC0BAAAEAAAA8AEBAAMAAAAAAA==是等边三角形,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,eqWmf183GmgAAAAAAAIAGAAIBCQAAAACQWgEACQAAA3IBAAACAJkAAAAAAAUAAAACAQEAAAAFAAAAAQL///8ABQAAAC4BGQAAAAUAAAALAgAAAAAFAAAADAIAAoAGCwAAACYGDwAMAE1hdGhUeXBlAABQABIAAAAmBg8AGgD/////AAAQAAAAwP///8X///9ABgAAxQEAAAUAAAAJAgAAAAIFAAAAFAJgAUUAHAAAAPsCgP4AAAAAAACQAQEAAAAAAgAQVGltZXMgTmV3IFJvbWFuAFjVjwDA7I92iJCVdosLkHYEAAAALQEAAA0AAAAyCgAAAAAEAAAAQlFBROsA+gLrAAADBQAAABQCYAGvAhwAAAD7AoD+AAAAAAAAkAEAAAABAAIAEFN5bWJvbAB2dsKRdkAAAABY1Y8AwOyPdoiQlXaLC5B2BAAAAC0BAQAEAAAA8AEAAAkAAAAyCgAAAAABAAAAXgAAA5kAAAAmBg8AJwFBcHBzTUZDQwEAAAEAAAABAABEZXNpZ24gU2NpZW5jZSwgSW5jLgAFAQAHBERTTVQ3AAETV2luQWxsQmFzaWNDb2RlUGFnZXMAEQVUaW1lcyBOZXcgUm9tYW4AEQNTeW1ib2wAEQVDb3VyaWVyIE5ldwARBE1UIEV4dHJhABNXaW5BbGxDb2RlUGFnZXMAEQbLzszlABIACCEvJ/JfIY8hL0dfQVDyHx5BUPQVD0EA9EX0JfSPQl9BAPQQD0NfQQDyHyCl8gol9I8h9BAPQQD0D0j0F/SPQQDyGl9EX0X0X0X0X0EPDAEAAQABAgICAgACAAEBAQADAAEABAAFAAoBABAAAAAAAAAADwECAINCAAIAg1EAAgSGpSJeAgCDQQACAINEAAAAsAoAAAAmBg8ACgD/////AQAAAAAAHAAAAPsCFAAJAAAAAAC8AgAAAIYBAgIiU3lzdGVtAHZ/CIooAAAKAAYAAAA4KmZgfwiKKIsLkHYEAAAALQEAAAQAAADwAQEAAwAAAAAA于点,交于点.则下列说法中错误的是

A.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 B.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

C.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 D.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

二、细心填一填,试试自己的身手!(本大题共5小题,每小题3分,共15分.请将结果直接填写在答题卡相应位置上)

11.已知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是等腰三角形,顶角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,则底角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          .

12.在平面直角坐标系中,点关于轴对称的点的坐标为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,则点的坐标是          .

13.如图,是一个测量工件内槽宽的工具,点既是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的中点,也是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的中点,若测得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,则该内槽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的宽为          .

14.如图,大树垂直于地面,为测树高,小明在处测得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,他沿的延长线方向走了米,到达处,测得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,则大树的高度为          米.page number 2

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