Răspunsuri

2014-07-02T16:26:28+03:00
A cerc = πR²
                   
  36π=πR²

⇒ R²=36

⇒R=√36

⇒R=6cm
2 5 2
2014-07-02T16:32:44+03:00
A cerc = π r²
36 π = π r²
r² = 36 π/π
r² = 36 cm²
r = √36
r = 6 cm