Using 3.14 as Pi the area of circle is: 28.259999999999998
A circle has only one measure for its radius. A shape that has a "radius" of 3 in by 4 in cannot be a circle.
A circle with a radius of 3 inches has an area of 28.27 square inches.
Area = pi*radius squared
9pi
28.26
The area of a circle with a radius of 3 feet is: 28.27 square feet.
A circle with a radius of 3 meters has an area of 28.27 square meters.
A circle with a radius of 3 cm has an area of 28.27 square cm.
A circle has only one measure for its radius. A shape that has a "radius" of 3 in by 4 in cannot be a circle.
A circle with a radius of 3 inches has an area of 28.27 square inches.
Area = pi*radius squared
If i do understand what u are saying then the equation is area=pi(radius^2) In this case it is 28=3.14(r^2) the radius is equal to 3 so the diameter is about 6. If i do understand what u are saying then the equation is area=pi(radius^2) In this case it is 28=3.14(r^2) the radius is equal to 3 (approx.) so the diameter is about 6.
9pi
28.26
29.6088132
Since you said radius, I assume you mean Circle or Sphere. Circle: Area = Pi * radius^2 therefore, Radius = Square Root of (Area/Pi). Sphere: Area = 4/3 Pi * Radius^3 therefore, Radius = CubeRoot of (3/4 * Area/Pi)
The 64 is equal to the radius squared. Therefore, 8 is the radius and the 9 and 3 are the coordinates of the center. Area of a circle is Pi * radius squared. In this case that is 64 times pi. or approximately 201.062