Bantu jawab ya, terima kasih☺️

Bab Perbandingan
Matematika SMP Kelas VII

15/20 = 18/a
a = 20 x 18 / 15
a = 24 cm

b/16 = 15/20
b = 16 x 15 / 20
b = 12 cm

c/10 = 15/20
c = 10 x 15 / 20
c = 7,5 cm