Nomor 29 kaka tolong bngt yahh

Sisi alas trapesium B/sisi alas trapesium A = sisi atas trapesium B/sisi atas trapesium A
s/12 = 12/8
s/12 = 3/2
s = 12 × 3/2
s = 18 cm

Cari tinggi trapesium A dulu
tA^2 = 5^2 - (12 - 8)^2
tA^2 = 25 - 16
tA = √9
tA = 3 cm

Tinggi trapesium B/tinggi trapesium A = sisi alas trapesium B/sisi alas trapesium A
tB/3 = 18/12
tB/3 = 3/2
tB = 3 × 3/2
tB = 4,5 cm

L trapesium B
= 1/2 × (12 + 18) × 4,5
= 1/2 × 30 × 4,5
= 15 × 4,5
= 67,5 cm^2