Surface Area & Volume of Spheres

Front

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

Back

The formula for the surface area of a sphere is 4πr², where r is the radius.

Front

What is the formula for the volume of a sphere?

Back

The formula for the volume of a sphere is (4/3)πr³, where r is the radius.

Front

How do you calculate the surface area of a sphere using 3.14 for π?

Back

To calculate the surface area, use the formula 4 × 3.14 × r².

Front

If a sphere has a radius of 5 cm, what is its surface area using 3.14 for π?

Back

The surface area is 4 × 3.14 × (5)² = 314 cm².

Front

If a sphere has a radius of 3 cm, what is its volume using 3.14 for π?

Back

The volume is (4/3) × 3.14 × (3)³ = 113.04 cm³.

Front

What is the relationship between the diameter and radius of a sphere?

Back

The radius is half of the diameter. r = d/2.

Front

How do you convert diameter to radius?

Back

To convert diameter to radius, divide the diameter by 2.

Front

What is the volume of a sphere with a diameter of 10 cm?

Back

The radius is 5 cm, so the volume is (4/3) × 3.14 × (5)³ = 523.33 cm³.

Front

What is the surface area of a sphere with a radius of 2 inches?

Back

The surface area is 4 × 3.14 × (2)² = 50.24 in².

Front

How do you round the volume of a sphere to the nearest tenth?

Back

Look at the hundredths place; if it's 5 or more, round up.