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Sagot :

Step-by-step explanation:

The diameter of the circle is 4 inches so its radius r is 2 inches. The area of the circle is

[tex]A = \pi r^2 = \pi(2\:\text{in})^2 = 12.57\:\text{in}^2[/tex]

The circumference C of the circle is

[tex]C = 2\pi r = 2\pi(2\:\text{in}) = 12.57\:\text{in}[/tex]