tolong jawab dengan benar nomor 4 dan 5

4) PR = diameter
d = k / π
d = 88 / 22/7
d = 88/1 : 22/7
d = 88/1 x 7/22
d = 7 x 4 = 28 cm

Pembuktian :
K = π x d
K = 22/7 x 28
K = 22x 4
k = 88 cm

5) OD = jari-jari
r = (7 x k) / 44
r = (7 x 132) / 44
r = 924 / 44
r = 21 cm

Pembuktian :
K = π x 2 x r
K = 22/7 x 2 x 21
K = 22 x 2 x 3
K = 44 x 3
K = 132 cm

Semoga membantu