# What is the equation for the surface area of a sphere?

##### 1 Answer

What a cool question! Are you planning on wallpapering a giant basketball? Well, the formula is

Wikipedia gives you the formula, as well as additional information.

You could even use that formula to calculate how much the surface area of the moon is! Make sure to follow the order of operations as you go: first, square your radius, then multiply it by

Example: the radius of the moon is 1 737.4 kilometers. Find the surface area.

Answer: 38 million square kilometers

The moon's surface area is about 14.6 million square miles (38 million square kilometers), which is less than the total surface area of the continent of Asia (17.2 million sq mi or 44.5 million sq km). The moon's mass is 7.35 x 1022 kg, about 1.2 percent of Earth's mass.