To find the diameter of the circle with only the area known, use the formula A=π×r2 where A=Area, π≈3.1415926535897932, r=radius. We know that Area is equal to 56.75in2and we know that π≈3.1415926535897932, but we do not know what the radius is equal to. In order to figure out what the radius is equal to, solve for r and then plug in what we know.
A=π×r2
Aπ=π×r2π
Aπ=1×r2
Aπ=r2
√Aπ=√r2
√Aπ=r
r=√Aπ
r=√A√π
r=√A√π×√π√π
r=√A√π√π√π
r=√Aπ√π√π
r=√Aπ√ππ
r=√Aπ√π2
r=√Aππ
r=√56.75ππ
r≈√56.75×3.14159265358979323.1415926535897932
r≈√178.28538309122076413.1415926535897932
r≈13.35235496424584887173.1415926535897932
r≈4.2501865889546685678486
Now we know that the radius is approximately equal to 4.2501865889546685678486; however, we want to know what the diamanter of the circle is, not the radius. In order to find the diamater, use the formula d=2r where d=diamater, r=radius.
d=2r
d≈2×4.2501865889546685678486
d≈8.5003731779093371356972
The diameter of a circle wth an area of 56.75in2 is approximately equal to 8.5003731779093371356972.