luas lingkaran 154. berapa keliling nya

L=(22/7)xr² =154
r²=154x (7/22)=49 maka r=√49 =7
K=2πr=2x(22/7)x7 =44

Luas = 22/7 × r²
154 = 22/7 × r²
r² = 7/22 × 154
r² = 49
r = √49 = 7

d = r × 2 = 14

keliling = phi × diameter
= 22/7 × 14 = 44 cm

semoga membantu ^^