Surface Area of Spheres Return to table of contents
A sphere is the set of all points that are the same distance from the center point. Like a circle, a sphere has a radius and a diameter. You will see that like a circle, the formula for surface area of a sphere also includes pi. Surface Area of a Sphere 4r2 click to reveal Radius
If the diameter of the Earth is 12,742 km, what is its surface area? 12,742 km
Try This: Find the surface area of a tennis ball whose diameter is 2.7 inches. 2.7 in click to reveal
50 Find the surface area of a softball with a diameter 3.8 inches.
51 How much leather is needed to make a basketball with a radius of 4.7 inches?
52 How much rubber is needed to make 6 racquetballs with a diameter of 5.7 inches?