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1.
(2020·澄海模擬)
如圖,在邊長(zhǎng)為2的正方形ABCD中,AE平分∠DAC,AE交CD于點(diǎn)F,CE⊥AE,垂足為點(diǎn)E,EG⊥CD,垂足為點(diǎn)G,點(diǎn)H在邊BC上,BH=DF,連接AH、FH,F(xiàn)H與AC交于點(diǎn)M.下面結(jié)論:①FH=2BH;②AC⊥FH;③DF=1;④ EG2=FG?DG.其中正確的個(gè)數(shù)為( )
A . 1
B . 2
C . 3
D . 4
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