Answer:
62.8 feet^2
Explanation:
Formula for circumference:
C = 2πr
Where "π" represents pi(3.14 or 22/7) and "r" represents the radius.
Since we are given the diameter, we have to find the radius in order to use this in the formula.
Diameter: A straight line connecting through the center of a shape of any kind to the edges of it (perimeter)-- basically a line from edge to edge that crosses through the center of it. In other words, two times the radius.
Radius: Half the diameter, and a line that runs from the center of a geometric figure to the edge.
Given that the diameter is 20 we just need to divide it by 2 to get the radius.
20/2 = 10 feet.
The radius is 10 feet which is the only measurement we'll ever need to find the circumference of a circle.
Plug into formula:
C = 2πr
C = 2(3.14)(10)
C = 2(31.4)
C = 62.8 feet^2.
The area of this circle is 62.8 feet^2.