作QF⊥AC延长线于F,
角A=角QCF=60度,角AEF=角QFC=90度,AP=CQ,==>△AEP全等于△CFQ
==>|PE=QF,==>△DEP全等于△DFQ ==>DE=DF,|
|AE=CF,==>AC=EF=1,|
==> DE=1/2
作QF⊥AC延长线于F,
角A=角QCF=60度,角AEF=角QFC=90度,AP=CQ,==>△AEP全等于△CFQ
==>|PE=QF,==>△DEP全等于△DFQ ==>DE=DF,|
|AE=CF,==>AC=EF=1,|
==> DE=1/2