MQ, BQ
∴mq=1/2cd=ep,bq=1/2ac=mp
∠∠AQB = 2∠ACB = 2∠DCE =∠DPE
∠AQM =∠ACP=∠DPM
∴∠AQB-∠AQM= ∠ DPE-∠DPM
Es decir: ∠ bqm = ∠ MPE
∴△MBQ≌△EMP
∴BM=EM
MQ, BQ
∴mq=1/2cd=ep,bq=1/2ac=mp
∠∠AQB = 2∠ACB = 2∠DCE =∠DPE
∠AQM =∠ACP=∠DPM
∴∠AQB-∠AQM= ∠ DPE-∠DPM
Es decir: ∠ bqm = ∠ MPE
∴△MBQ≌△EMP
∴BM=EM