Berapa keliling bangun gabungan tersebut

1. sisi = 14 cm
keliling persegi = 4*s = 4*14 = 56cm
keliling 2 lingkaran = 2πd = 2*22/7*14= 88 cm
keliling bangun = 56+88= 144 cm

2. sisi = 7 cm
keliling bangun= 4*s = 4*7=28cm

3. panjang = 20cm, lebar = 10cm
keliling = 2(p+l) = 2(20+10) = 2(30) = 60cm

4. r = 10 cm
keliling lingkaran = π*d = 3,14*10 = 31,4 cm