Answer:

The circumference of the lamp shade is 57 inches.                      

Step-by-step explanation:

Given : A lamp shade has a radius of 9 inches.

To find : The circumference of the top of the shade

Solution : A lamp shade is in a sphere form,

So, formula to find the circumference of sphere is

C=2pi r

Now, the radius of lamp is 9 inches and pi=3.14

Substitute the value in the formula we get,

C=2pi r

C=2times 3.14 times 9

C=56.52

Round to nearest whole number circumference is 57 .

Therefore,The circumference of the lamp shade is 57 inches.