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Assuming you are asking for the area of the circle which has a circumference of 40.8 cm:

circumference = 2 x π x radius

→ radius = circumference/2π

area = π x radius2

= π x (circumference/2π)2

= circumference2/4π

= (40.8 cm)2 ÷ 4π

≈ 132.47 cm2

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Q: What is the area if the circumference is 40.8cm?
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