A sphere has a diameter of 12 ft. What is the surface area of the sphere? Express the answer in terms of pi. Recall the formula SA=4 pi r^2. pi ft^2

Question

asked Dec 3, 2020 4.1k views

2 Answers

Rabbitt · Answer 1 · 2020-12-09T03:22:43+0000

Answer:

$SA=144\pi\ ft^2$

Explanation:

We know that the diameter of the sphere is 12 feet.

By definition the radius of the sphere is:

r =(d)/(2)

Where d is the diameter of the sphere

Then

r =(12)/(2)

$r =6\ ft$

Now we calculate the surface area of the sphere using the formula

$SA=4\pi r^2$

$SA=4\pi (6)^2$

$SA=4\pi(36)$

$SA=144\pi\ ft^2$