Hitunglah keliling seluruh bangun di samping! tolong di jwb dengan cepat ya​

4. Keliling 1/2 lingkaran = 1/2 x π x d

K = 1/2 x 3,14 x 20

K = 3,14 x 10

K = 31,4cm

Keliling total = 31,4cm + 25cm + 35cm + 20cm

Ktotal = 114,4cm

5. Keliling 1/4 lingkaran = 1/4 x π x d

K = 1/4 x 3,14 x 60

K = 3,14 x 15

K = 47,1

K total = 30cm x 4 + 47,1

K total = 120cm + 47,1

K total = 167,1 cm