Question

Determine the area of a circle that has a radius of 8 cm. If necessary round answers to nearest tenth.

Answer 1

Hey! So, yeah, there's this really cool fact about circles that lets you find the area just by knowing the radius! All you have to do is
\[\Large \pi*r^2\]

Answer 2

tbrroks pls substitute as Smoothmath said

Answer 3

Here's a quick example. If I have this circle:

I notice that the radius is 2, so to find the area, all I have to do is:
\[\Large \pi*(2)^2 = \pi*4 = 4\pi \approx 12.566\]

Answer 4

thanks for given me a simplified example it helps alot for my other questions .

Answer 5

but if it say round to nearest tenth would i make it 12.57 ?