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The area of a circle is calculated by multiplying the square of its radius by pi and can thus be represented with the equation: A = πr^2 where A= area and r=radius. The radius of a circle is equal to half its diameter.

Consequently the first step to answering this question would be calculating the radius of the circle.

r= d/2

= 64/2

=32 miles

This means that the formula to calculate the area for a circle with a diameter of 64 miles would be:

A = π(32^2)

Working this through would give us:

A = π(32^2)

= 1024 π

= 3216.99 square miles (2 d.p.)

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Q: Which is the formula to calculate area for a circle with diameter 64 miles?
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