Keliling lingkaran 232 cm berapakah diameter

d = 2r

K = 2r.pi

232 = 2r.22/7

232/22 = 2r/7

(220+32)/22 = 2r/7

10+32/22 = 2r/7

10+16/11 = 2r/7

2r = 70+16.7/11

   = 70 + 112/11

2r ≈ 70 + 10,2

2r ≈ 80,2 cm