本课配套习题挑战模式1/5
如图,线段AB两个端点的坐标分别为A(6,6),B(8,2),以原点O为位似中心,在第一象限内将线段AB缩小为原来的后得到线段CD,则端点C的坐标为( )
A: (3,3) |
B: (4,3) |
C: (3,1) |
D: (4,1) |
- 提示1:PHA+5Yip55So5L2N5Ly85Zu+5b2i55qE5oCn6LSo57uT5ZCI5Lik5Zu+5b2i55qE5L2N5Ly85q+U6L+b6ICM5b6X5Ye6Q+eCueWdkOaghzwvcD4=
- 答案:QQ==
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
本课配套习题挑战模式2/5
已知,如图,E(-4,2),F(-1,-1)以O为位似中心,按比例尺1:2把△EFO缩小,点E的对应点的坐标( )
A: (-2,1) |
B: (2,-1) |
C: (2,-1)或(-2,1) |
D: (2,1)或(2,-1) |
- 提示1:PHA+5Yip55So5L2N5Ly85Zu+5b2i55qE5oCn6LSo77yM5Zyo5bmz6Z2i55u06KeS5Z2Q5qCH57O75Lit77yM5aaC5p6c5L2N5Ly85Y+Y5o2i5piv5Lul5Y6f54K55Li65L2N5Ly85Lit5b+D77yM55u45Ly85q+U5Li6a++8jOmCo+S5iOS9jeS8vOWbvuW9ouWvueW6lOeCueeahOWdkOagh+eahOavlOetieS6jmvmiJYta++8jOi/m+iAjOW+l+WHuuetlOahiC48L3A+
- 答案:Qw==
PHA+6Kej77ya4oi1Re+8iC0077yMMu+8ie+8jEbvvIgtMe+8jC0x77yJ5LulT+S4uuS9jeS8vOS4reW/g++8jOaMieavlOS+i+WwujHvvJoy5oqK4pazRUZP57yp5bCP77yMPGJyPuKItOeCuUXnmoTlr7nlupTngrnnmoTlnZDmoIfkuLrvvJrvvIgy77yMLTHvvInmiJbvvIgtMu+8jDHvvIkuPGJyPuaVhemAiUMuPC9wPg==
本课配套习题挑战模式3/5
在平面直角坐标系中有两点A(6,2),B(6,0),以原点为位似中心,相似比为1:2. 则线段AB的对应线段A′B′的长为( )
A: 1 |
B: 2 |
C: 1或4 |
D: 2或6 |
- 提示1:PHA+5YWI5rGC5Ye657q/5q61QULnmoTplb/vvIznhLblkI7liIbnsbvorqjorrrvvJrlvZPnur/mrrVBQuS4jue6v+autUHigLJC4oCy55qE55u45Ly85q+U5Li6Me+8mjLvvIzliJlB4oCyQuKAsj0yQULvvJs8L3A+
- 提示2:PHA+5b2T57q/5q61QeKAskLigLLkuI7nur/mrrVBQueahOebuOS8vOavlOS4ujHvvJoy77yM5YiZQeKAskLigLI9PGltZyBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwL0I0LzAxL3JCQUNFMVBraWluUldSdUxBQUFCRGxrb0R5czg5MS5wbmciIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvQjQvMDEvckJBQ0UxUGtpaW5SV1J1TEFBQUJEbGtvRHlzODkxLnBuZyIgaGVpZ2h0PSI0MiIgd2lkdGg9IjgiPkFCLjwvcD4=
- 答案:Qw==
PHA+6Kej77ya4oi1Qe+8iDbvvIwy77yJ77yMQu+8iDbvvIww77yJ77yMPGJyPuKItEFCPTItMD0y77yMPGJyPuW9k+e6v+autUFC5LiO57q/5q61QeKAskLigLLnmoTnm7jkvLzmr5TkuLox77yaMu+8jOWImUHigLJC4oCyPTJBQj0077ybPGJyPuW9k+e6v+autUHigLJC4oCy5LiO57q/5q61QULnmoTnm7jkvLzmr5TkuLox77yaMu+8jOWImUHigLJC4oCyPTxpbWcgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC9CNC8wMS9yQkFDRTFQa2lpblJXUnVMQUFBQkRsa29EeXM4OTEucG5nIiBkYXRhLWNrZS1zYXZlZC1zcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwL0I0LzAxL3JCQUNFMVBraWluUldSdUxBQUFCRGxrb0R5czg5MS5wbmciIGhlaWdodD0iNDIiIHdpZHRoPSI4Ij5BQj0xLjxicj7mlYXpgIlDLjwvcD4=
本课配套习题挑战模式4/5
如图,以点C(-1,0)为位似中心,作△ABC的位似图形△A′B′C,若点B的横坐标是-2,点B的对应点B′的横坐标是2,则把△ABC的边长放大到了原来的倍数是( )
A: 1 |
B: 2 |
C: 3 |
D: 4 |
- 提示1:PHA+5rGC5Ye6QuOAgUPlkoxC4oCy44CBQ+S4pOeCueeahOaoquWdkOagh+eahOi3neemu++8jOWGjeagueaNruS9jeS8vOavlOWIl+W8j+iuoeeul+WNs+WPr+W+l+inoy48L3A+
- 答案:Qw==
PHA+6Kej77ya4oi15Lul54K5Q++8iC0x77yMMO+8ieS4uuS9jeS8vOS4reW/g++8jOS9nOKWs0FCQ+eahOS9jeS8vOWbvuW9ouKWs0HigLJC4oCyQ++8jDxicj7ngrlC55qE5qiq5Z2Q5qCH5pivLTLvvIzngrlC55qE5a+55bqU54K5QuKAsueahOaoquWdkOagh+aYrzLvvIw8YnI+4oi0QuOAgUPpl7TnmoTmqKrlnZDmoIfnmoTplb/luqbkuLrvvJox77yMQuKAsuOAgUPpl7TnmoTmqKrlnZDmoIfnmoTplb/luqbkuLoz77yMPGJyPuKItOKWs0FCQ+aUvuWkp+WIsOWOn+adpeeahDPlgI3lvpfliLDilrNB4oCyQuKAskMuPGJyPuaVhemAie+8mkMuPC9wPg==
本课配套习题挑战模式5/5
如图,△ABC经过位似变换得到△DEF,点O是位似中心且OA=AD,则△ABC与△DEF的面积比是( )
A: 1:6 |
B: 1:5 |
C: 1:4 |
D: 1:2 |
- 提示1:PHA+55Sx4pazQUJD57uP6L+H5L2N5Ly85Y+Y5o2i5b6X5Yiw4pazREVG77yM54K5T+aYr+S9jeS8vOS4reW/g+S4lE9BPUFE77yM5qC55o2u5L2N5Ly85Zu+5b2i55qE5oCn6LSo77yM5Y2z5Y+v5b6XQUPiiKVERu+8jOWNs+WPr+axguW+l0FD77yaREY9T0HvvJpPRD0x77yaMjwvcD4=
- 提示2:PHA+54S25ZCO5qC55o2u55u45Ly85LiJ6KeS5b2i6Z2i56ev55qE5q+U562J5LqO55u45Ly85q+U55qE5bmz5pa577yM5Y2z5Y+v5rGC5b6X4pazQUJD5LiO4pazREVG55qE6Z2i56ev5q+ULjwvcD4=
- 答案:Qw==
PHA+6Kej77ya4oi14pazQUJD57uP6L+H5L2N5Ly85Y+Y5o2i5b6X5Yiw4pazREVG77yM54K5T+aYr+S9jeS8vOS4reW/g+S4lE9BPUFE77yMPGJyPuKItEFD4oilREbvvIw8YnI+4oi04pazT0FD4oi94pazT0RG77yMPGJyPuKItEFD77yaREY9T0HvvJpPRD0x77yaMu+8jDxicj7iiLTilrNBQkPkuI7ilrNERUbnmoTpnaLnp6/mr5TmmK8x77yaNC48YnI+5pWF6YCJQy48L3A+