本课配套习题挑战模式1/5
如图,O是AC的中点,M是AB的中点,N是BC的中点,试判断MN与OC的数量关系为( )
A: |
B: |
C: |
D: |
- 提示1:PHA+5YWI5Yir566h6YCJ6aG577yM5Yip55So5Zu+5ZKM5Lit54K555qE5oCn6LSo5rGC5Ye6TU7nmoTplb/luqY8L3A+
- 提示2:PHA+5rGC5Ye6TU7nmoTplb/luqblkI7vvIznrZTmoYjmmL7ogIzmmJPop4E8L3A+
- 答案:RA==
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
本课配套习题挑战模式2/5
如图,点A、B、C顺次在直线L上,点M是线段AC的中点,点N是线段BC的中点. 若想求出MN的长度,那么只需条件( )
A: AB=12 |
B: BC=4 |
C: AM=5 |
D: CN=2 |
- 提示1:PHA+5qC55o2u54K5TeaYr+e6v+autUFD55qE5Lit54K577yM54K5TuaYr+e6v+autUJD55qE5Lit54K55rGC5Ye6TU7nmoTplb/luqY8L3A+
- 提示2:PHA+55yLTU7nlKjku4DkuYjmnaXooajnpLrvvIzlsLHlj6/pgInlh7rnrZTmoYg8L3A+
- 答案:QQ==
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
本课配套习题挑战模式3/5
如图,已知是线段上的一点,是线段的中点,是线段的中点,为的中点,为的中点,则为( )
A:
|
B:
|
C:
|
D: 以上答案都不对 |
- 提示1:PHA+5LiN55So6ICD6JmRTU7nmoTplb/luqbmgI7kuYjmsYLvvIzlj6rpnIDmoLnmja7lt7Lnn6XkuK3lkI7ljYrmrrXkv6Hmga/msYLlh7pRUOeahOmVv+W6pjwvcD4=
- 答案:Qw==
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
本课配套习题挑战模式4/5
如图所示,B,C是线段AD上任意两点,M是AB的中点,N是CD的中点,若BC=a,MN=b,则AD的长度是( )
A: b-a |
B: a+b |
C: 2b-a |
D: 以上都不对 |
- 提示1:PHA+5Y+v5Lu/54Wn5pys6IqC6K++55qE5pyA5ZCO5LiA6YGT5L6L6aKY55qE5pa55rOV5rGC5Ye6TU7nmoTplb/luqYs55SoQUTlkoxCQ+adpeihqOekuk1O55qE6ZW/5bqmLjwvcD4=
- 提示2:PHA+6KeC5a+fTU7nmoTooajovr7lvI/vvIzlsIblt7Lnn6Xph49CQ+WSjE1O5Luj5YWlPC9wPg==
- 答案:Qw==
PGRpdj7op6PvvJriiLVN5pivQULnmoTkuK3ngrnvvIxO5pivQ0TnmoTkuK3ngrnvvIxCQz1hLDwvZGl2PjxkaXY+4oi0TU49TUIrQ04rQkM9PGltZyBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzAxL0QyL3JCQUNGRk1OVWUyaTJ6c2ZBQUFCSkhxcWlqazAxOS5wbmciIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMDEvRDIvckJBQ0ZGTU5VZTJpMnpzZkFBQUJKSHFxaWprMDE5LnBuZyIgaGVpZ2h0PSI0MiIgd2lkdGg9IjEyIj5BQis8aW1nIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMDEvRDIvckJBQ0ZGTU5VZXJ6Sno3QkFBQUJJbGpsRG5JNzE3LnBuZyIgZGF0YS1ja2Utc2F2ZWQtc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8wMS9EMi9yQkFDRkZNTlVlcnpKejdCQUFBQklsamxEbkk3MTcucG5nIiBoZWlnaHQ9IjQyIiB3aWR0aD0iOSI+Q0QrYT08aW1nIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMDEvRDIvckJBQ0ZGTU5VZXJ6Sno3QkFBQUJJbGpsRG5JNzE3LnBuZyIgZGF0YS1ja2Utc2F2ZWQtc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8wMS9EMi9yQkFDRkZNTlVlcnpKejdCQUFBQklsamxEbkk3MTcucG5nIiBoZWlnaHQ9IjQyIiB3aWR0aD0iOSI+KEFCK0NEKSthPTxpbWcgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8wMS9EMi9yQkFDRkZNTlVlcnpKejdCQUFBQklsamxEbkk3MTcucG5nIiBkYXRhLWNrZS1zYXZlZC1zcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzAxL0QyL3JCQUNGRk1OVWVyekp6N0JBQUFCSWxqbERuSTcxNy5wbmciIGhlaWdodD0iNDIiIHdpZHRoPSI5Ij4oQUQtYSkrYT08aW1nIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMDEvRDIvckJBQ0ZGTU5VZXJ6Sno3QkFBQUJJbGpsRG5JNzE3LnBuZyIgZGF0YS1ja2Utc2F2ZWQtc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8wMS9EMi9yQkFDRkZNTlVlcnpKejdCQUFBQklsamxEbkk3MTcucG5nIiBoZWlnaHQ9IjQyIiB3aWR0aD0iOSI+KEFEK2EpPGJyPuKItU1OPWLvvIw8YnI+4oi0Yj08aW1nIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMDEvRDIvckJBQ0ZGTU5VZXJ6Sno3QkFBQUJJbGpsRG5JNzE3LnBuZyIgZGF0YS1ja2Utc2F2ZWQtc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8wMS9EMi9yQkFDRkZNTlVlcnpKejdCQUFBQklsamxEbkk3MTcucG5nIiBoZWlnaHQ9IjQyIiB3aWR0aD0iOSI+KEFEK2EpPGJyPuKItDJiPUFEK2HvvIw8YnI+4oi0QUQ9MmEtYi48L2Rpdj48ZGl2Pjxicj7mlYXpgIlDLjwvZGl2Pg==
本课配套习题挑战模式5/5
已知B,C是线段AD上的两点,E是AB的中点,F是CD的中点,AD=18,BC=5,则EF的长度为( ).
A: 12.5 |
B: 11.5 |
C: 5.5 |
D: 7.5 |
- 提示1:PHA+55S75Ye65Zu+5b2i77yM55S755qE5pe25YCZ5rOo5oSP5bqU6K+l5Li65Lik56eN5oOF5Ya1OyBC5Y+v5Lul5ZyoQ+eahOW3puS+p++8jOS5n+WPr+S7peWcqEPnmoTlj7Pkvqc8L3A+
- 提示2:PHA+5qC55o2u55S75Ye655qE5Zu+5b2i77yM5Yip55So5Lit54K55oCn6LSo77yM55yLRUbor6XmgI7kuYjooajnpLo8L3A+
- 答案:Qg==
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