1. Surface Area of Spheres Return to table of contents

2. 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. Radius Surface Area of a Sphere 4  r 2 click to reveal

3. If the diameter of the Earth is 12,742 km, what is its surface area? 12,742 km

4. Try This: Find the surface area of a tennis ball whose diameter is 2.7 inches. 2.7 in click to reveal

5. 50Find the surface area of a softball with a diameter 3.8 inches.

6. 51How much leather is needed to make a basketball with a radius of 4.7 inches?

7. 52How much rubber is needed to make 6 racquetballs with a diameter of 5.7 inches?