七年级目标班春季第五次作业

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OE=OF

EB=FD

OB=OD

OA=OC

AE=CF

AB=CD

∠M=∠N

∠MAC=∠NAB

∠MAD=∠NAE

∠ABC=∠ACB

∠DCA=∠EBA

∠MAC=∠NAB