jika panjang AB= 12cm, BD= 9cm, maka panjang CD=

Panjang BC :
AB² = BD × BC
12² = 9 × BC
144 = 9BC
BC = 144 ÷ 9
BC = 16 cm

Panjang CD :
CD = BC - BD
CD = 16 cm - 9 cm
CD = 7 cm

Jawaban : A. 7 cm

Maaf Kalau Salah