人教新版八年級(jí)上冊(cè)《13.2 畫軸對(duì)稱圖形》2021年同步練習(xí)卷(江西省南昌市紅谷灘區(qū)鳳凰城上海外國(guó)語(yǔ)學(xué)校)
發(fā)布:2024/4/20 14:35:0
一.選擇題(共11小題)
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1.若點(diǎn)P(a+1,2-2a)關(guān)于x軸的對(duì)稱點(diǎn)在第四象限,則a的取值范圍在數(shù)軸上表示為( ?。?/h2>
A. B. C. D. 組卷:1418引用:20難度:0.8 -
2.在平面直角坐標(biāo)系中,點(diǎn)A(m-1,2)與點(diǎn)B(3,n)關(guān)于y軸對(duì)稱,則( )
A.m=3,n=2 B.m=-2,n=3 C.m=2,n=3 D.m=-2,n=2 組卷:793引用:3難度:0.7 -
3.已知點(diǎn)P(2,-4)與點(diǎn)Q(6,-4)關(guān)于某條直線對(duì)稱,則這條直線是( ?。?/h2>
A.x軸 B.y軸 C.過點(diǎn)(4,0)且垂直于x軸的直線 D.過點(diǎn)(0,-4)且平行于x軸的直線 組卷:3116引用:11難度:0.5 -
4.在平面直角坐標(biāo)系中,點(diǎn)(-5,6)關(guān)于x軸對(duì)稱的點(diǎn)在( ?。?/h2>
A.第一象限 B.第二象限 C.第三象限 D.第四象限 組卷:186引用:3難度:0.7 -
5.在平面直角坐標(biāo)系中,將點(diǎn)A(-2,-3)向右平移2個(gè)單位長(zhǎng)度得到點(diǎn)B,則點(diǎn)B關(guān)于x軸的對(duì)稱點(diǎn)C的坐標(biāo)為( ?。?/h2>
A.(0,-3) B.(2,-3) C.(4,-3) D.(0,3) 組卷:294引用:6難度:0.8 -
6.若點(diǎn)A(a,5),在第二象限,則點(diǎn)A關(guān)于直線m(直線m上各點(diǎn)的橫坐標(biāo)都是1)對(duì)稱的點(diǎn)坐標(biāo)是( ?。?/h2>
A.(-a,5) B.(2-a,5) C.(-a-4,-5) D.(-a-2,-5) 組卷:850引用:14難度:0.6 -
7.平面直角坐標(biāo)系中,已知點(diǎn)P(a,-3)在第四象限,則點(diǎn)P關(guān)于直線x=2對(duì)稱的點(diǎn)的坐標(biāo)是( ?。?/h2>
A.(a,1) B.(-a+2,-3) C.(-a+4,-3) D.(-a,-3) 組卷:1745引用:9難度:0.5 -
8.在平面直角坐標(biāo)系中,點(diǎn)P(0,1)關(guān)于直線x=-1的對(duì)稱點(diǎn)坐標(biāo)是( ?。?/h2>
A.(-2,1) B.(2,1) C.(0,-1) D.(0,1) 組卷:1257引用:8難度:0.7
三.解答題(共4小題)
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23.在4×4的正方形網(wǎng)格中建立如圖1、2所示的直角坐標(biāo)系,其中格點(diǎn)A,B的坐標(biāo)分別是(0,1),(-1,-1).(1)請(qǐng)圖1中添加一個(gè)格點(diǎn)C,使得△ABC是軸對(duì)稱圖形,且對(duì)稱軸經(jīng)過點(diǎn)(0,-1).
(2)請(qǐng)圖2中添加一個(gè)格點(diǎn)D,使得△ABD也是軸對(duì)稱圖形,且對(duì)稱軸經(jīng)過點(diǎn)(1,1).組卷:835引用:21難度:0.5 -
24.如圖在邊長(zhǎng)為1個(gè)單位長(zhǎng)度的小正方形組成的網(wǎng)格中給出了格點(diǎn)△ABC和格點(diǎn)線段DE(頂點(diǎn)或端點(diǎn)為網(wǎng)格線的交點(diǎn)),以及過格點(diǎn)的直線L.
(1)畫出△ABC關(guān)于直線成軸對(duì)稱的△A1B1C1;
(2)將線段DE進(jìn)行平移后,使點(diǎn)D的對(duì)應(yīng)點(diǎn)D1與點(diǎn)B1重合,畫出平移后的線段D1E1;
(3)填空:∠C1B1E1的度數(shù)是.組卷:144引用:2難度:0.5