Keliling lingkaran berdiameter Dik D 7 cm maka R =

Dik: D=7
Dit: R….?
jawab
R=1/2.D
=1/3 . 7
= 3.5

Keliling lingkaran 2πr
r = ½d
r = ½7cm
r = 3,5cm
keliling = 2xπx3,5cm
kelilinh = 2×22/7×3,5cm
keliling = 21,98cm