本课配套习题挑战模式1/5
单选题
难度系数:
1.下列四个命题中,假命题是( )
A: 有一个锐角相等的两个等腰三角形相似 |
B: 有一个锐角相等的两个直角三角形相似 |
C: 底边和腰对应成比例的两个等腰三角形相似 |
D: 斜边和直角边对应成比例的两个直角三角形相似 |
一次做对,真牛!
+5奖励规则>
- 提示1:5qC55o2u55u45Ly85LiJ6KeS5b2i55qE5ZCE56eN5Yik5a6a5pa55rOV6YCQ6aG55YiG5p6Q5Y2z5Y+v77yO
- 答案:QQ==
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
本课配套习题挑战模式2/5
单选题
难度系数:
2.如图所示,在▱ABCD中,BE交AC,CD于G,F,交AD的延长线于E,则图中的相似三角形有( )
A: 3对 |
B: 4对 |
C: 5对 |
D: 6对 |
一次做对,真牛!
+5奖励规则>
- 提示1:5qC55o2u55u45Ly85LiJ6KeS5b2i55qE5Yik5a6a5p2l5om+5Ye65YWx5pyJ5aSa5bCR5a+555u45Ly855qE5LiJ6KeS5b2i77yO
- 答案:RA==
6Kej77yaQUTiiKVCQ++8jOWPr+efpeKWs0FHReKIveKWs0NHQu+8jOKWs0RGReKIveKWs0NGQu+8jOKWs0FCQ+KIveKWs0NEQe+8jDxicj5BQuKIpUNE77yM5Y+v55+l4pazQUJH4oi94pazQ0ZH77yM4pazQUJG4oi94pazQ0ZC77yM4pazRURG4oi94pazRUFC77yOPGJyPuWFseaciTblr7nvvIw8YnI+5pWF6YCJRA==
本课配套习题挑战模式3/5
单选题
难度系数:
3.如图,已知:△ABC、△DEA是两个全等的等腰直角三角形,∠BAC=∠D=90°,两条直角边AB、AD重合,把AD绕点A逆时针旋转α角(0°<α<90°),到如图所示的位置时,BC分别与AD、AE相交于点F、G,则图中共有( )对相似三角形.
A: 1 |
B: 2 |
C: 3 |
D: 4 |
一次做对,真牛!
+5奖励规则>
- 提示1:5qC55o2u5bey55+l5Y+K55u45Ly85LiJ6KeS5b2i55qE5Yik5a6a5pa55rOV6L+b6KGM5YiG5p6Q77yM5LuO6ICM5b6X5Yiw562U5qGI77yO
- 答案:RA==
6Kej77ya4oi14pazQUJD5LiO4pazREVB5piv5Lik5Liq5YWo562J55qE562J6IWw55u06KeS5LiJ6KeS5b2i77yM4oigQkFDPeKIoEVEQT05MMKw77yMPGJyPuKItOKIoEM94oigQj3iiKBEQUU94oigRT00NcKw77yMPGJyPuKIteKIoENGQT3iiKBCK+KIoEZBQu+8jOKIoEdBQj3iiKBGQUcr4oigRkFC77yMPGJyPuKItOKIoENGQT3iiKBCQUfvvIw8YnI+4oi04pazQ0FG4oi94pazQkdB77yMPGJyPuKItOKWs0JHQeKIveKWs0FHRuKIveKWs0NBRu+8mzxicj7ov5jmnInilrNBQkPiiYzilrNERUHvvIw8YnI+4oi055u45Ly85LiJ6KeS5b2i5YWx5pyJNOWvue+8jjxicj7mlYXpgInvvJpE77yO
本课配套习题挑战模式4/5
单选题
难度系数:
4.如图,AB是半圆O的直径,D,E是半圆上任意两点,连结AD,DE,AE与BD相交于点C,要使△ADC与△ABD相似,可以添加一个条件.下列添加的条件其中错误的是( )
A: ∠ACD=∠DAB |
B: AD=DE |
C: AD2=BD•CD |
D: CD•AB=AC•BD |
一次做对,真牛!
+5奖励规则>
- 提示1:55Sx4oigQURDPeKIoEFEQu+8jOagueaNruacieS4pOinkuWvueW6lOebuOetieeahOS4ieinkuW9ouebuOS8vOS4juS4pOe7hOWvueW6lOi+ueeahOavlOebuOetieS4lOWkueinkuWvueW6lOebuOetieeahOS4pOS4quS4ieinkuW9ouebuOS8vO+8jOWNs+WPr+axguW+l+etlOahiO+8m+azqOaEj+aOkumZpOazleWcqOino+mAieaLqemimOS4reeahOW6lOeUqO+8jg==
- 答案:RA==
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
本课配套习题挑战模式5/5
单选题
难度系数:
5.如图,已知AB≠AC,要使△AEF∽△ACB,且EF与BC不平行,还需补充的条件可以是( )
A: ∠AEF=∠B |
B: ∠AFE=∠C |
C: ∠AFE=∠B |
D: ∠A=∠A |
一次做对,真牛!
+5奖励规则>
- 提示1:5Yip55So5Lik6KeS5rOV5Y+v5Yik5pat4pazQUVG4oi94pazQUNC77yM6aaW5YWI4oigQT3iiKBB77yM5YaN5re75Yqg5LiA5Liq5Y2z5Y+v77yO
- 答案:Qw==
6Kej77ya4oi1RUbkuI5CQ+S4jeW5s+ihjO+8jDxicj7iiLTiiKBBRkXiiaDiiKBD77yM4oigQUVG4omg4oigQu+8jDxicj7lj6/mt7vliqDiiKBBRkU94oigQu+8jjxicj7or4HmmI7vvJriiLXiiKBBPeKIoEHvvIziiKBBRkU94oigQ++8jDxicj7iiLTilrNBRUbiiL3ilrNBQ0LvvI48YnI+5pWF6YCJQ++8jg==