keliling lingkaran yg luasnya 154cm adalah

Lingkaran.

L = πr² → r² = L / π
K = 2πr
K² = 4π²(L / π)
K = 2√(πL)
   = 2 √[22/7 (154 cm²)] = 44 cm

Luas = Πr²
154 = 22/7 . r²
154 / 22/7 =r²
154.7/22 =r²
1078/22 =r²
49 = r²
√49 =r
7 Cm = r

Diameter = 2.r
Diameter = 2.7
Diameter = 14 Cm

Kll = ΠD
Kll = 22/7 x 14
Kll = 22 x 2
Kll = 44 Cm