Bantu jawab ya!!! Please

jawab

lingkaran
a= 72
r = 10m

Panjang kawat = 3 (Panjang busur + 2 r)
PK  =  3 ( 72/360 x 2 pi r + 2r)
Pk = 3 (1/5 . 2. 3.14 . 10 + 20)
PK = 3 (12,56 + 20)
PK = 3 (32,56)
PK = 97,68 m