∴AB=AC,AE=AD,∠CAB=∠EAD=60,
∠∠BAE+∠EAC = 60,∠DAC+∠EAC=60,
∴∠BAE=∠CAD,
In △AEB and △ADC,
AB=AC∠BAE=∠CADAE=AD
∴△aeb≌△adc(sas);
(2) Solution: The shape of quadrilateral BCGE is a diamond,
The reason is: ∫△AEB?△ADC.
∴∠ABE=∠ACD,BE=CD,
∠∠ABC =∠ACB = 60,
∴∠ABE=∠ACD=∠BCG= 120,
∴∠DBE=60,
∴∠BCG+∠DBE= 180,
∴BE∥CG,
∵BC∨EG,
∴ quadrilateral BCGE is a parallelogram,
BC = CD,
∴BE=BC,
∴ Quadrilateral parallelogram BCGE is a diamond.