Question

DOC已知△ABC中,∠A=42°,∠B=28°,CD平分∠ACB,CE⊥AB于点E求∠ACD的度数

Answer 1

1.已知：EP平分∠AEF,FQ平分∠DFE 所以 ∠AEF=2∠PEF ∠DFE=2∠EFQ ∵AB//CD ∴∠AEF=∠DFE ∴2∠PEF=2∠EFQ ∴∠PEF=∠EFQ 所以EP//FQ2.已...