tolong yaa kak......................

9.
ukuran foto
lebar = 12 cm
panjang = 15 cm

ukuran karton
lebar = 12 + 2 + 2 = 16 cm
p / 16 = 15 / 12
p / 16 = 5 / 4
p = 5/4 x 16
p = 20 cm

luas karton = p x l = 20 x 16 = 320 cm²

jawaban A

10.
t / 15 = 1,5 / 3
t / 15 = 1/2
t = 1/2 x 15
t = 7,5 m

jawaban B

11.
AB / 9 = 10 / 6
AB / 9 = 5 / 3
AB = 5/3 x 9
AB = 15 cm

jawaban D