Respuesta :

mathstudent55

Answer:

(pi)(n^2 - n^2)

Step-by-step explanation:

A = (pi)r^2

r = n

A_n = (pi)n^2

r = m

A_m = (pi)m^2

A_sombreada = A_n - A_m =

= (pi)n^2 - (pi)m^2

= (pi)(n^2 - n^2)

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