Respuestas

2012-08-20T13:16:12+02:00

25=πr²

r²=25/π

r=5/√π

r=5√π/π m

2012-08-20T14:15:38+02:00

Identificando como:

 

A= Area

 

r= Radio

 

(PI) = 3.1416

 

La ecuacion del area es: A = (PI) * (r)^2 Despejando r:

 

(r)^2 = (A/PI) => r = (A/PI)^(1/2) => r = RAIZ CUADRADA (A/PI)

 

 

Si A= 25 m^2

 

Sustituyendo en la ecuacion:

 

 

r= (25/PI)^(1/2) = 5/(PI^(1/2))

 

RACIONALIZANDO:

 

r = [5/(PI^(1/2))] * (PI^(1/2))/(PI^(1/2)) = (5*(PI^(1/2)))/(PI)