Question

Berapakah panjang DE? Yuk dibahas :)

Answer 1

DE garis sumbu = AE = EB = 5 cm
lihat Δ ABC
keliling (s) = .(8 + 12 + 10) = 15
L = 
  = 
  = 
  = 15√7
L.Δ BED =  x 15√7
x BE x DE =  ...kalikan dgn 2
BE x DE = 15√7
  5 x DE = 15√7
       DE = 
       DE = 3√7 cm

Answer 2

Garis sumbu DE = AE = BE = 5cm
 keliling (s) = .(8 + 12 + 10) = 15
L = 
  = 
  = 
  = 15√7
L.Δ BED =  x 15√7
 x BE x DE =  dikalikan 2
BE x DE = 15√7
  5 x DE = 15√7
       DE = 
       DE = 3√7 cm