lanjutan nyaa .. ukuran jari-jarinya adalah...

a. r = 3 cm
K = 2πr
K = 2 × 3,14 × 3
K = 18,84 cm

b. r = 4 cm
K = 2πr
K = 2 × 3,14 × 4
K = 25,12 cm

c. r = 5 cm
K = 2πr
K = 2 × 3,14 × 5
K = 31,4 cm

d. r = 6 cm
K = 2πr
K = 2 × 3,14 × 6
K = 37,68 cm

e. r = 7 cm
K = 2πr
K = 2 × 22/7 × 7
K = 44 cm