JARI-JARI(R)=30CM. DIAMETER=........ RUMUS(V)=3,14. LUAS=...........

diameter = 60 cm
luas = πr²
= 3,14 . 30 . 30
=2826

Jari - Jari (R) = 30 cm
Diameter (D) = 30 x 2 = 60 cm'
Luas = 3,14 x 30 x 30 = 2.826 cm