配套习题- 平行四边形的性质（2） -【青果学院】

挑战习题

1/5单选题

难度：

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

提示1：: 55SxQULiiKVDROWPr+S7peaOqOWHuuKIoEY94oigRkJB77yM5Y+I4oi14oigQUJD5bmz5YiG57q/5Li6QUXvvIziiLTiiKBGQkM94oigRkJB77yM562J6YeP5Luj5o2i5Y2z5Y+v5b6X5Yiw4oigRj3iiKBGQkPvvIzmoLnmja7nrYnohbDkuInop5LlvaLnmoTliKTlrprnn6XpgZNCQz1DRu+8jOaJgOS7peW+l+WIsEZEPUNGLUNEPUJDLUFCPUFELUFC77yM55Sx5q2k5Y+v5Lul5rGC5Ye6REbvvI4=

正确答案：Qg==

6Kej562U77ya4oi1QULiiKVDRO+8jDxicj7iiLTiiKBGPeKIoEZCQe+8jDxicj7iiLXiiKBBQkPlubPliIbnur/kuLpCRe+8jDxicj7iiLTiiKBGQkM94oigRkJB77yMPGJyPuKItOKIoEY94oigRkJD77yMPGJyPuKItEJDPUNG77yMPGJyPuKItEZEPUNGLUNEPUJDLUFCPUFELUFCPTctND0zY23vvI48YnI+5pWF6YCJQu+8jg==

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2/5单选题

难度：

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

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=

正确答案：QQ==

6Kej562U77ya4oi15Zub6L655b2iQUJDROaYr+W5s+ihjOWbm+i+ueW9ou+8jDxicj7iiLRBQj1DRO+8jEFEPUJD77yMT0E9T0PvvIw8YnI+4oi1T03iiqVBQ++8jDxicj7iiLRBTT1DTe+8jDxicj7iiLXilrNDRE3nmoTlkajplb/mmK8xMGNt77yMPGJyPuWNs++8mkRNK0NNK0NEPURNK0FNK0NEPUFEK0NEPTEwY23vvIw8YnI+4oi05bmz6KGM5Zub6L655b2iQUJDROeahOWRqOmVv+S4uu+8mjLvvIhBRCtDRO+8iT0yw5cxMD0yMO+8iGNt77yJ77yOPGJyPuKItOW5s+ihjOWbm+i+ueW9okFCQ0TnmoTlkajplb/kuLoyMGNt77yOPGJyPuaVhemAiUHvvI4=

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3/5单选题

难度：

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°

提示1：: 5Zug5Li65bmz6KGM5Zub6L655b2i5a+56L655bmz6KGM77yM5omA5Lul55Sx5Lik55u057q/5bmz6KGM77yM5ZCM5peB5YaF6KeS5LqS6KGl77yM5Y+v5b6X4oigQSviiKBCPTE4MMKw77yM55Sx5bey55+l5piT6K+B4oigQkVDPTkwwrDvvIzmiYDku6XlnKhSdOKWs0JFQ+S4re+8jOeUseS4ieinkuW9oueahOWGheinkuWSjOWumueQhuefpeKIoEJDRT0zMMKw77yO

正确答案：RA==

6Kej77ya4oi15bmz6KGM5Zub6L655b2iQUJDRO+8jOKIoEE9MTIwwrA8YnI+4oi04oigQj0xODDCsC0xMjDCsD02MMKwPGJyPuWPiOKItUNF4oqlQUI8YnI+4oi04oigQkNFPTkwwrAt4oigQj0zMMKwPGJyPuaVhemAiUTvvI4=

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4/5单选题

难度：

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

提示1：: 6YCa6L+H5LiJ6KeS5b2iT0JD55qE5ZGo6ZW/5ZKMQkPnmoTplb/msYLlh7pPQitPQw==

提示2：: 5b6X5Ye6QUMrQkTnmoTplb8=

正确答案：Qg==

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5/5单选题

难度：

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°

提示1：: 5YWI5rGC5Ye64oigQUVC55qE5bqm5pWw

提示2：: 5qC55o2u5a+56L655bmz6KGM5b6X4oigRUJD5bqm5pWw77yM6L+b6ICM5b6X5Ye64oigQUJD5bqm5pWw77yM5YaN5qC55o2u5bmz6KGM5b6X5Ye64oigQeW6puaVsA==

正确答案：Qw==

6Kej77ya4oi14oigQkVEPTE1MMKwPGJyPuKItOKIoEFFQj0zMMKwPGJyPuKItUFCQ0TmmK/lubPooYzlm5vovrnlvaI8YnI+4oi0QUTiiKVCQzxicj7iiLTiiKBFQkM94oigQUVCPTMwwrA8YnI+4oi1QkXlubPliIbiiKBBQkM8YnI+4oi04oigQUJDPTYwwrA8YnI+4oi04oigQT0xMjDCsA==

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