本课配套习题挑战模式1/5
单选题
难度系数:
1.如图,在▱ABCD中,AB=4cm,AD=7cm,∠ABC平分线交AD于E,交CD的延长线于点F,则DF=( )
A: 2 |
B: 3 |
C: 4 |
D: 5 |
一次做对,真牛!
+5奖励规则>
- 提示1:55SxQULiiKVDROWPr+S7peaOqOWHuuKIoEY94oigRkJB77yM5Y+I4oi14oigQUJD5bmz5YiG57q/5Li6QUXvvIziiLTiiKBGQkM94oigRkJB77yM562J6YeP5Luj5o2i5Y2z5Y+v5b6X5Yiw4oigRj3iiKBGQkPvvIzmoLnmja7nrYnohbDkuInop5LlvaLnmoTliKTlrprnn6XpgZNCQz1DRu+8jOaJgOS7peW+l+WIsEZEPUNGLUNEPUJDLUFCPUFELUFC77yM55Sx5q2k5Y+v5Lul5rGC5Ye6REbvvI4=
- 答案:Qg==
6Kej562U77ya4oi1QULiiKVDRO+8jDxicj7iiLTiiKBGPeKIoEZCQe+8jDxicj7iiLXiiKBBQkPlubPliIbnur/kuLpCRe+8jDxicj7iiLTiiKBGQkM94oigRkJB77yMPGJyPuKItOKIoEY94oigRkJD77yMPGJyPuKItEJDPUNG77yMPGJyPuKItEZEPUNGLUNEPUJDLUFCPUFELUFCPTctND0zY23vvI48YnI+5pWF6YCJQu+8jg==
本课配套习题挑战模式2/5
单选题
难度系数:
2.如图,平行四边形ABCD的对角线相交于点O,且AD≠CD,过点O作OM⊥AC,交AD于点M,如果△CDM的周长是10cm,则平行四边形ABCD的周长为( )
A: 20 |
B: 30 |
C: 40 |
D: 50 |
一次做对,真牛!
+5奖励规则>
- 提示1:55Sx5Zub6L655b2iQUJDROaYr+W5s+ihjOWbm+i+ueW9ou+8jOWNs+WPr+W+l0FCPUNE77yMQUQ9QkPvvIxPQT1PQ++8jA==
- 提示2:55SxT03iiqVBQ++8jOagueaNruWeguebtOW5s+WIhue6v+eahOaAp+i0qO+8jOWNs+WPr+W+l0FNPUNN
- 提示3:55Sx4pazQ0RN55qE5ZGo6ZW/5pivNDBjbe+8jOWNs+WPr+axguW+l+W5s+ihjOWbm+i+ueW9okFCQ0TnmoTlkajplb/vvI4=
- 答案:QQ==
6Kej562U77ya4oi15Zub6L655b2iQUJDROaYr+W5s+ihjOWbm+i+ueW9ou+8jDxicj7iiLRBQj1DRO+8jEFEPUJD77yMT0E9T0PvvIw8YnI+4oi1T03iiqVBQ++8jDxicj7iiLRBTT1DTe+8jDxicj7iiLXilrNDRE3nmoTlkajplb/mmK8xMGNt77yMPGJyPuWNs++8mkRNK0NNK0NEPURNK0FNK0NEPUFEK0NEPTEwY23vvIw8YnI+4oi05bmz6KGM5Zub6L655b2iQUJDROeahOWRqOmVv+S4uu+8mjLvvIhBRCtDRO+8iT0yw5cxMD0yMO+8iGNt77yJ77yOPGJyPuKItOW5s+ihjOWbm+i+ueW9okFCQ0TnmoTlkajplb/kuLoyMGNt77yOPGJyPuaVhemAiUHvvI4=
本课配套习题挑战模式3/5
单选题
难度系数:
3.如图,在平行四边形ABCD中,CE⊥AB,E为垂足,如果∠A=120°,那么∠BCE的度数是( )
A: 80° |
B: 50° |
C: 40° |
D: 30° |
一次做对,真牛!
+5奖励规则>
- 提示1:5Zug5Li65bmz6KGM5Zub6L655b2i5a+56L655bmz6KGM77yM5omA5Lul55Sx5Lik55u057q/5bmz6KGM77yM5ZCM5peB5YaF6KeS5LqS6KGl77yM5Y+v5b6X4oigQSviiKBCPTE4MMKw77yM55Sx5bey55+l5piT6K+B4oigQkVDPTkwwrDvvIzmiYDku6XlnKhSdOKWs0JFQ+S4re+8jOeUseS4ieinkuW9oueahOWGheinkuWSjOWumueQhuefpeKIoEJDRT0zMMKw77yO
- 答案:RA==
6Kej77ya4oi15bmz6KGM5Zub6L655b2iQUJDRO+8jOKIoEE9MTIwwrA8YnI+4oi04oigQj0xODDCsC0xMjDCsD02MMKwPGJyPuWPiOKItUNF4oqlQUI8YnI+4oi04oigQkNFPTkwwrAt4oigQj0zMMKwPGJyPuaVhemAiUTvvI4=
本课配套习题挑战模式4/5
单选题
难度系数:
4.在平行四边形ABCD中,对角线AC、BD交于点O,△OBC的周长为59,BC的长为28,BD-AC=14,那么对角线AC、BD的长分别是( )
A: 12,19 |
B: 24,38 |
C: 8.5,22.5 |
D: 15.5,29.5 |
一次做对,真牛!
+5奖励规则>
- 提示1:6YCa6L+H5LiJ6KeS5b2iT0JD55qE5ZGo6ZW/5ZKMQkPnmoTplb/msYLlh7pPQitPQw==
- 提示2:5b6X5Ye6QUMrQkTnmoTplb8=
- 答案:Qg==
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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,在平行四边形ABCD中,∠ABC的平分线交AD于E,∠BED=150°,则∠A的大小为( )
A: 150° |
B: 130° |
C: 120° |
D: 100° |
一次做对,真牛!
+5奖励规则>
- 提示1:5YWI5rGC5Ye64oigQUVC55qE5bqm5pWw
- 提示2:5qC55o2u5a+56L655bmz6KGM5b6X4oigRUJD5bqm5pWw77yM6L+b6ICM5b6X5Ye64oigQUJD5bqm5pWw77yM5YaN5qC55o2u5bmz6KGM5b6X5Ye64oigQeW6puaVsA==
- 答案:Qw==
6Kej77ya4oi14oigQkVEPTE1MMKwPGJyPuKItOKIoEFFQj0zMMKwPGJyPuKItUFCQ0TmmK/lubPooYzlm5vovrnlvaI8YnI+4oi0QUTiiKVCQzxicj7iiLTiiKBFQkM94oigQUVCPTMwwrA8YnI+4oi1QkXlubPliIbiiKBBQkM8YnI+4oi04oigQUJDPTYwwrA8YnI+4oi04oigQT0xMjDCsA==