If a circle and a sphere have the same radius, then CSA of sphere is times the area of the circle.
Let the radius of sphere and circle be r Then, Area of a circle = πr2 CSA of sphere = 4πr2 Hence, the CSA of the sphere is 4 times area of the circle.
If we take a circle and a sphere of the same radius, then the surface area of the sphere is ___ times the area of the circle.
If we take a circle and a hemisphere of the same radius, then the total surface area of the hemisphere is___ times the area of the circle.