tentukan EF! tolong bantuanya :v

EF = (ABxDE + CDxAE) / AD
      = (19 x 6 + 14 x 4) / 10
      = (114 + 56) / 10
      = 170 / 10
      = 17 cm

EF = ((DC x EA) + (AB x DE))/ AD
EF = ((14x4) + (19x6))/10=17 cm