本课配套习题挑战模式1/5
单选题
难度系数:
1.下列命题中.①中心对称图形一定是轴对称图形;②有两条互相垂直的对称轴的轴对称图形一定是中心对称图形;③关于某一点为中心对称的两个三角形全等;④两个重合的图形一定为中心对称.其中正确的个数为( )
A: 1个 |
B: 2个 |
C: 3个 |
D: 4个 |
一次做对,真牛!
+5奖励规则>
- 提示1:5YiG5Yir5qC55o2u5Lit5a+556ew5Zu+5b2i5Lul5Y+K5Lit5b+D5a+556ew5ZKM6L205a+556ew5Zu+5b2i55qE5oCn6LSo6L+b6KGM5Yik5pat5b6X5Ye65Y2z5Y+v77yO
- 答案:Qg==
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
本课配套习题挑战模式2/5
单选题
难度系数:
2.下列描述中心对称的特征的语句中,其中正确的是( )
A: 成中心对称的两个图形中,连接对称点的线段不一定经过对称中心 |
B: 成中心对称的两个图形中,对称中心不一定平分连接对称点的线段 |
C: 成中心对称的两个图形中,对称点的连线一定经过对称中心,但不一定被对称中心平分 |
D: 成中心对称的两个图形中,对称点的连线一定经过对称中心,且被对称中心平分 |
一次做对,真牛!
+5奖励规则>
- 提示1:5qC55o2u5Lit5b+D5a+556ew55qE5oCn6LSo77yM4pGg5YWz5LqO5Lit5b+D5a+556ew55qE5Lik5Liq5Zu+5b2i6IO95aSf5a6M5YWo6YeN5ZCI77yb4pGh5YWz5LqO5Lit5b+D5a+556ew55qE5Lik5Liq5Zu+5b2i77yM5a+55bqU54K555qE6L+e57q/6YO957uP6L+H5a+556ew5Lit5b+D77yM5bm25LiU6KKr5a+556ew5Lit5b+D5bmz5YiG77yM5Yik5pat5ZCE6YCJ6aG55Y2z5Y+v5b6X5Ye6562U5qGI77yO
- 答案:RA==
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
本课配套习题挑战模式3/5
单选题
难度系数:
3.如图,△ABC与△A′B′C′关于点O成中心对称,则下列结论不成立的是( )
A: 点A与点A′是对称点 |
B: BO=B′O |
C: AB∥A′B′ |
D: ∠ACB=∠C′A′B′ |
一次做对,真牛!
+5奖励规则>
- 提示1:5qC55o2u5Lit5b+D5a+556ew55qE5oCn6LSo5a+55ZCE6YCJ6aG55YiG5p6Q5Yik5pat5ZCO5Yip55So5o6S6Zmk5rOV5rGC6Kej77yO
- 答案:RA==
6Kej77ya6KeC5a+f5Zu+5b2i5Y+v55+l77yMPGJyPkHjgIHngrlB5LiO54K5QeKAsuaYr+WvueensOeCue+8jOaVheacrOmAiemhueato+ehru+8mzxicj5C44CBQk89QuKAsk/vvIzmlYXmnKzpgInpobnmraPnoa7vvJs8YnI+Q+OAgUFC4oilQeKAskLigLLvvIzmlYXmnKzpgInpobnmraPnoa7vvJs8YnI+ROOAgeKIoEFDQj3iiKBB4oCyQ+KAskLigLLvvIzmlYXmnKzpgInpobnplJnor6/vvI48YnI+5pWF6YCJRO+8jg==
本课配套习题挑战模式4/5
单选题
难度系数:
4.如图,在平面直角坐标系中, 若△ABC与△A1B1C1关于E点成中心对称, 则对称中心E点的坐标是
A: (0,0) |
B: (1,-1) |
C: (2,-1) |
D: (3,-1) |
一次做对,真牛!
+5奖励规则>
- 提示1:6L+e5o6l5a+55bqU54K5
- 答案:RA==
6Kej77ya6L+e5o6lQUE8c3ViPjE8L3N1Yj7jgIFDQzxzdWI+MTwvc3ViPu+8jOWImeS6pOeCueWwseaYr+WvueensOS4reW/g0XngrnvvI48YnI+6KeC5a+f5Zu+5b2i55+l77yMRe+8iDPvvIwtMe+8ie+8juaVhemAiUQ=
本课配套习题挑战模式5/5
单选题
难度系数:
5.如图所示,已知△ABC与△CDA关于点O对称,过O任作直线EF分别交AD、BC于点E、F,下面的结论:(1)点E和点F,B和D是关于中心O的对称点;(2)直线BD必经过点O;(3)四边形ABCD是中心对称图形;(4)四边形DEOC与四边形BFOA的面积必相等;(5)△AOE与△COF成中心对称,其中正确的个数为( )
A: 1个 |
B: 2个 |
C: 3个 |
D: 5个 |
一次做对,真牛!
+5奖励规则>
- 提示1:55Sx5LqO4pazQUJD5LiO4pazQ0RB5YWz5LqO54K5T+WvueensO+8jOmCo+S5iOWPr+W+l+WIsEFCPUNE44CBQUQ9QkPvvIzljbPlm5vovrnlvaJBQkNE5piv5bmz6KGM5Zub6L655b2i77yM55Sx5LqO5bmz6KGM5Zub6L655b2i5piv5Lit5b+D5a+556ew5Zu+5b2i77yM5LiU5a+556ew5Lit5b+D5piv5a+56KeS57q/5Lqk54K577yM5Y+v5qC55o2u5LiK6L+w54m554K55a+55ZCE57uT6K666L+b6KGM5Yik5pat77yO
- 答案:RA==
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