∠ABC=66°,∠ACB=54°
∠BAC=180-66-54=60°
BE⊥AC,∠BEA=90,∠ABE=180-∠BEA-∠BAC=180-90-60=30
∠EBC=∠ABC-∠ABE=66-30=36
CF⊥AB,∠AFC=90,∠ACF=180-∠AFC-∠BAC=180-90-60=30
∠BCF=∠ACB-∠ACF=54-30=24
∠BHC=180-∠EBC-∠BCF=180-36-24=120
∠ABC=66°,∠ACB=54°
∠BAC=180-66-54=60°
BE⊥AC,∠BEA=90,∠ABE=180-∠BEA-∠BAC=180-90-60=30
∠EBC=∠ABC-∠ABE=66-30=36
CF⊥AB,∠AFC=90,∠ACF=180-∠AFC-∠BAC=180-90-60=30
∠BCF=∠ACB-∠ACF=54-30=24
∠BHC=180-∠EBC-∠BCF=180-36-24=120