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Find the answer to this middle school math problem
B is BP∑AC, MN is p,

∫BP∑AC,

∴∠PBA+∠BAC= 180,

∫∠BAC = 90,

∴∠PBA=∠BAC=90,

According to the formula (2), ∠BAP=∠ACF,

∴ in △ACF and △ABP,

∠PBA=∠FAC

AB=AC

∠BAP=∠ACF

?

∴△ACF≌△ABP(ASA),

∴∠AFC=∠BPA,AF=BP

BF = AF,

∴BF=BP,

∵△ABC is an isosceles right triangle,

∴∠ABC=45,

∫∠PBA = 90,

∴∠PBG=45,

∴∠ABC=∠PBG,

At △BFG and △BPG,

BF=BP

∠FBG=∠PBG

Blood sugar = blood sugar

?

∴△BFG≌△BPG(SAS),

∴∠BPG=∠BFG,

∠∠BPG =∠AFE,

∴∠BFG=∠AFE.