It is: pi*402 = 1600*pi square feet
Area of circle: pi times radius squared
In general the formula for the area of any circle is: pi*radius squared
251.2 feet
A circle with a radius of 40 cm has an area of 5,026.55 square cm.
Radius: 40/2pi = 6.366197724 Area: pi*6.366197724 squared = 127.324 square feet rounded
Area of circle: pi times radius squared
In general the formula for the area of any circle is: pi*radius squared
In general the formula for the area of any circle is: pi*radius squared
251.2 feet
A circle with a radius of 40 cm has an area of 5,026.55 square cm.
Radius: 40/2pi = 6.366197724 Area: pi*6.366197724 squared = 127.324 square feet rounded
In order to even discuss this question, we must assume that the unit of the '40' is the square of the unit of the '4'. -- The radius, diameter, and circumference of the circle with an area of 40 are each 10.794% shorter than the corresponding measurement in the circle with radius = 4 . -- Its area (40) is 20.423% less than the area of the circle with the radius of 4 .
Diameter = 2 * radius So in this case, 40 feet.
40'
Radius = 3.57 inches.
The formula for the area of a circle is: 3.14 (pi) times the radius squared. A circle with a 40 mile radius would have an area of 3.14 x 40 x 40 = 5024 square miles.
area of a circle is calculated using the formula a=(pi)r2 where a is the area and r is the radius of the circle. so:if the diameter(distance from one edge of the circle to the other that passes through the mid point) of your circle is 40 feet then you would need approximately 1256 square feet give or take a couple square inches.if the circumference (length around the edge of the circle) of your circle is 40 feet then the over all area is 127.38 square feet.