keliling lingkaran yang luasnya 154cm2,jika phi 22/7 adalh

Keliling = phi x diameter
Diameter = 7 cm x 2 = 14 cm
Bukti = 22/7 x 7 cm x 7 cm = 154 cm²
Maka keliling = 22/7 x 14 cm = 44 cm
Semoga membantu ^_^

L=phi x r^2
154=22/7r^2
r^2=49
r=7
K=phi x d
=22/7 x 14
=44 cm