Perhatiin gambar bangun di sampling. Keliling bangun adalah

28 : 2 = 14 x 3 =42
1/4 x22/7x28 =22
42 + 22 = 64
tolong bantu like ya,,, trms

K = Kpersegi + K¼lingkaran
K = 4.12 + ¼.22/7.28
K = 48 + 22
K = 70 cm

Semoga membantu :)