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20 17 Xiqing district two-mode mathematics
AM = AN,BM=DN,

∴AD=AB,

∵ quadrilateral ABCD is a parallelogram,

∴ The quadrilateral ABCD is a diamond,

∫MG∨AD,NF∨AB,

∴ Quadrilateral Amen is a parallelogram,

∫ Quadrilateral EFCG is a parallelogram.

∴AM∥. Well, Ann ∨. I

∴EN∥.DG,ME∨。 BF,

The quadrilateral EFCG is a parallelogram,

∴EF∥.CG,EG∨。 FC,

∴ND∥.EG∨。 CF,BM∨。 EF∨。 CG,

∴ quadrilateral BMEF and quadrilateral NDGE are parallelograms,

∴BM=EF,ND=EG,

Also, the quadrilateral ABCD is a diamond,

∴AB=AD,

∴AB-BM=AD-ND,

That is AM=AN,

The Amen of the parallelogram is a diamond,

Similarly, the parallelogram EFCG is a diamond,

∴: So there are three squares in the picture.

So the answer is 3.