Pertanyaan :
Jawaban :
L = πr²
314 = 3,14 × r²
314 : 3,14 = r²
r² = 100
r = √100
r = 10
314 = 3,14 × r²
314 : 3,14 = r²
r² = 100
r = √100
r = 10
diameter = 2r
d = 2 ×10
d = 20
diameter = 2r
d = 2 ×10
d = 20