The circumference C of a circle with diameter d is given by:
[tex]C=\pi d[/tex]
Substitute d = 80 and π ≈ 3.14 into the equation:
[tex]\begin{gathered} C=3.14\times80 \\ C=251.2\text{ cm} \end{gathered}[/tex]
The area A of a circle with diameter d is given by:
[tex]A=\frac{\pi d^2}{4}[/tex]
Substitute d = 80 and π ≈ 3.14 into the equation:
[tex]A=\frac{3.14\times80^2}{4}=5024[/tex]
Therefore, the required circumference is 251.2 cm
Therefore, the required area is 5024 cm²
