WEEK OF 5/11 Surface Area of a Sphere

Front

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

Back

The surface area (A) of a sphere is given by the formula A = 4πr², where r is the radius.

Front

If the diameter of a sphere is 10 inches, what is the radius?

Back

The radius is half of the diameter, so the radius is 5 inches.

Front

Calculate the surface area of a sphere with a radius of 5 inches.

Back

Using the formula A = 4πr², the surface area is A = 4π(5)² = 100π ≈ 314.16 in².

Front

What is the surface area of a sphere with a radius of 11 inches?

Back

Using the formula A = 4πr², the surface area is A = 4π(11)² = 484π ≈ 1,519.76 in².

Front

What does surface area represent in a three-dimensional shape?

Back

Surface area represents the total area that the surface of the object occupies.

Front

If a sphere has a radius of 7 cm, what is its surface area?

Back

Using the formula A = 4πr², the surface area is A = 4π(7)² = 196π ≈ 615.75 cm².

Front

What is the relationship between diameter and radius?

Back

The radius is half of the diameter.

Front

Find the surface area of a sphere with a radius of 10 cm.

Back

Using the formula A = 4πr², the surface area is A = 4π(10)² = 400π ≈ 1,256.64 cm².

Front

What is the surface area of a sphere with a radius of 3 inches?

Back

Using the formula A = 4πr², the surface area is A = 4π(3)² = 36π ≈ 113.1 in².

Front

How do you convert diameter to radius?

Back

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