Calculating Surface Area of a Sphere

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

• 4 PI R squared

• 2 PI R cubed

• 2 PI R squared

• PI R squared

If the radius of a sphere is doubled, how does the surface area change?

• It increases eight times

• It stays the same

• It quadruples

• It doubles

What is the surface area of a sphere with a radius of 11 cm, using Pi as 3.14?

• 1520 cm squared

• 1600 cm squared

• 1500 cm squared

• 1519.76 cm squared

How do you find the radius if you are given the diameter of the sphere?

• None of the above

• Multiply the diameter by Pi

• Divide the diameter by 2

• Multiply the diameter by 2

What is the surface area of a sphere with a radius of 5 feet, using Pi as 3.14?

• 314 feet squared

• 310 feet squared

• 320 feet squared

• 300 feet squared

For a sphere measured in inches with a radius of 9, what is the calculated surface area?

• 1015 inches squared

• 1020 inches squared

• 1000 inches squared

• 1017.36 inches squared

What is the correct calculation for the surface area of a sphere when the diameter is given?

• Divide the diameter by 2 and use the result as the radius

• Use the diameter directly in the formula

• Multiply the diameter by 2 and use the result

• None of the above

If a sphere has a diameter of 15 cm, what is its radius?

• 3.75 cm

• 30 cm

• 15 cm

• 7.5 cm

What unit is used to express the surface area of a sphere?

• Square units

• Linear units

• Cubic units

• None of the above

What is the surface area of a sphere with a radius of 7.5 cm, using Pi as 3.14?

• 700 cm squared

• 710 cm squared

• 720 cm squared

• 706.5 cm squared