dari gambar di samping,DE = 10cm,AD = 6cm,CF = 5cm.tentukan panjang BD! sama caranya juga kak

DE = AF = 10 cm
FE = AD = 6 cm
CF = 5 cm

FE/AB = CF/AC
6/(AD + BD) = 5/(AF + CF)
6/(6 + BD) = 5/(10 + 5)
6/(6 + BD) = 5/15 = 1/3
6 + BD = 3 × 6
BD = 18 - 6
BD = 12 cm