Keliling lingkaran yg memiliki luas 49phi cm2 adalah...... Tolong pke caranya ya??

langsung aja y

L = πr²
49π = πr²
√49 = r
7 = r
jari jarinya 7 cm

K = 2πr
K = 2 × 22/7 × 7
K = 2 × 22
K = 44 cm

semoga berguna +_+

L=πr²
π49
π7²
K = π2r / 14π
= 22/7*2*7
= 22*2
= 44 cm