Question

Dik:keliling 188,4
dit:jari.diameter.luas

Answer 1

Keliling = πd

188,4 = 3,14 . d
d = 188,4 / 3,14
d = 60 satuan panjang

r = 1/2d
r = 1/2.60
r = 30 satuan panjang

l = πr²
l = 3,14 . 30²
l = 3,14 . 900
l = 2826 satuan luas

Answer 2

K:2×Π×r
188,4:2×3,14×r
188,4:6,28×r
r = 188,4/6,28
r=30 cm

D= 2×r
2×30
60 cm
L = 3,14×30×30
= 2826 cm persegi

semoga membantu!!