角B+角C=180-60=120
角BPC=180-1/2角B-1/2角C
=180-1/2*120
=120
角ACD=180-角C
=角A+角B
=120
角E=180-(1/2角B+角C+1/2角ACD)
=180-(1/2角B+角C+1/2角A+1/2角B)
=180-(角B+角C+1/2角A)
=180-(120+30)
=30
角B+角C=180-60=120
角BPC=180-1/2角B-1/2角C
=180-1/2*120
=120
角ACD=180-角C
=角A+角B
=120
角E=180-(1/2角B+角C+1/2角ACD)
=180-(1/2角B+角C+1/2角A+1/2角B)
=180-(角B+角C+1/2角A)
=180-(120+30)
=30