Geometry Quiz on Spheres and Hemispheres

What is the formula for the surface area of a sphere?

• πr²

• 4πr

• 4πr²

• 2πr²

If the radius of a sphere is 5 meters, what is its surface area?

• 157.1 meters squared

• 314.2 meters squared

• 628.4 meters squared

• 78.5 meters squared

How do you find the radius if the diameter of a sphere is given as 7 inches?

• Multiply the diameter by π

• Divide the diameter by 4

• Multiply the diameter by 2

• Divide the diameter by 2

What is the surface area of a hemisphere with a radius of 3 feet?

• 21.2 feet squared

• 169.6 feet squared

• 42.4 feet squared

• 84.8 feet squared

If the circumference of a great circle is π, what is the radius of the sphere?

• π

• 1/2

• 1

• 2

What is the formula for the volume of a sphere?

• 2/3πr³

• 4/3πr³

• 4/3πr²

• πr³

How is the volume of a hemisphere calculated from the volume of a sphere?

• Multiply by 2

• Divide by 2

• Add π

• Subtract π

What is the volume of a sphere with a radius of 5 feet?

• 261.8 feet cubed

• 523.6 feet cubed

• 1047.2 feet cubed

• 314.2 feet cubed

If the radius of a hemisphere is 6 inches, what is its volume?

• 226.2 inches cubed

• 904.8 inches cubed

• 678.6 inches cubed

• 452.4 inches cubed

Given the area of a great circle is 50, what is the radius of the sphere?

• 3.99

• 5

• 7

• 2.5