tolong jawab nomor 39 dan 56 !!!pakai caranya!!!

39.keliling A# 22/7 x 14 = 44 : 2 = 22
Keliling B# 20+20+14= 154
22+154=76 (B)

MAAF KALO SALAH

39.
keliling 1/2 lingkaran = 1/2 × π × d
(π × d) ÷ 2 = (22/7 × 14) ÷ 2 = 44 ÷ 2 = 22

keliling bangun tersebut :
22 + 20 + 14 + 20 = 76 cm

56.
12 × 12 = 144 × 9 = 1296 cm^2
36 × 12 = 432 × 3 = 1296 cm^2
1296 + 1296 = 2592 cm^2