b. AB/EF = BC/FC

AB/6 = 7/4
AB = 7/4 x 6
AB = 10,5 cm

c. EC/AC = EF/AB

EC/9 = 2/6
EC = 2/6 x 9
EC = 3
AE = AC - EC
AE = 9 - 3 = 6 cm

Baca Juga: Kunci Jawaban Bahasa Inggris Kelas 9 Halaman 138 Paragraf 4-5 dan Artinya

d. CF/CB = EF/AB

CF/ CF + 4 = 5/7

7 x CF = 5 (CF + 4)
7CF = 5CF + 20
2CF = 20
CF = 20/2
CF = 10 cm

e. AE/DB = EC/BC

AE/6 = 14/7
AE = 2 x 6
AE = 12 cm

F. EF = DF x AB + FA x DC/ DF + FA

EF = 6x8 + 3x2/ ^+3
EF = 48+6/9
EF = 54/9
EF = 6 cm

Baca Juga: Kunci Jawaban Seni Budaya Kelas 9 Halaman 181 (Pameran Seni Rupa)

Itulah tadi kunci jawaban Matematika Kelas 9 halaman 256 nomor 15 a-f. Semoga bermanfaat!