Question

Hitung keliling lingkaran yang diketahui luasnya 1.256cm`. Beserta cara

Answer 1

Π = 3,14
L = πr²
r²= L/π
r²= 1256/3,14
r²= 400
r = √400
r = 20
D= 40
K = πD
K = 3,14x40
K = 125,6cm
semiga membantu..

Answer 2

Luas =  r ²
1256 = 22/7 xr²
1256 x 7 = 22 x r²
8792 = 22 x r²
√8792 = 22 x r
93,76 = 22 x r
93,76 : 22 = r
4,26 = r

K = 2 r
   = 2 x 3,14 x 4,26
   = 26,75 cm²