Respuesta :

mykaylaoros

Answer:

Result: The area of a circle with circumference 9π is 63.62

Formulae:

Step-by-step explanation:

r = 4.5 d = 9 C = 28.3 A = πr2 = π(d2)2 A = C24π π = 3.1415 A = area C = circumference or perimeter r = radius, d = diameter

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