Hitung jari lingkaran jika kelilingnya a. 132 b. 314

A. 132 : 3,14 = 42,0
B. 3,14 : 3,14 = 1


Kl gk salah hehehe..
Semoga membantu

a). π x d = keliling
==> 22/7 x d = 132
==> d = 7/22 x 132
==> d = 42
r = 1/2 x d = 1/2 x 42 = 21

b). π x d = keliling
==> 3,14 x d = 314
==> d = 314 / 3,14
==> d = 10
r = 1/2 x d = 1/2 x 10 = 5