# What is the circumference of a circle whose area is 16pi?

Then teach the underlying concepts
Don't copy without citing sources
preview
?

#### Explanation

Explain in detail...

#### Explanation:

I want someone to double check my answer

7
Jan 6, 2016

$8 \pi$

#### Explanation:

The circumference of a circle is $2 \pi r$ and the area of a circle is given by $\pi {r}^{2}$
$\pi {r}^{2} = 16 \pi$
$\therefore r = \sqrt{16} = 4$
Circumference $= 2 \pi r = 2 \pi \cdot 4 = 8 \pi$

• 32 minutes ago
• 33 minutes ago
• 33 minutes ago
• 34 minutes ago
• 42 seconds ago
• 2 minutes ago
• 11 minutes ago
• 16 minutes ago
• 23 minutes ago
• 27 minutes ago
• 32 minutes ago
• 33 minutes ago
• 33 minutes ago
• 34 minutes ago