Hitunglah panjang sisi-sisi yang belum diketahui.
Pembahasan :
m < C = M < E (sehadap)
m < FEC = m
m << CFE = m < EDB = m < CAB (sehadap)
FE
__ = CE/BE
BD
FE = CE/BE. BD
= 6/8. 12
= 9 cm
DE
_ = BE/CE
FC
DE = BE/CE.FC
= 8/6.5
= 20/3
= 6 2/3 cm
AB = 9 + 12 = 21 cm
panjang CB = 14 cm
panjang CA = 11 2/3 cm∆ CEF ~ ∆ BDE ~ ∆ ABC
gambar (iii)
foto
∆ ABC ~ ∆ EBD
CA
_ = AB/BE = BC/BD
DE
panjang CB =…?
BC
_ = AB/BE
BD
BC = AB/BE . BD
= 16/8. 12
= 24 cm
DE
__ = BE/AB
AC
DE = BE/ AB . AC
= 8/16. 14
= 7 cm
CE = BC – BE
CE = 24 cm – 8 cm
CE = 16 cm
