Question

what is the circumference of a circular disc with a diameter of 10 cm?

Answer 1

The formula for circumference of a circle is : \(C = 2\pi r\)

in order to find r, we take the diameter, and divide by 2. \(\large r=\frac{D}{2}\)

What wouldyou get as your diameter?

Answer 2

radius*

Answer 3

5 right?

Answer 4

Yes 5 is correct.

Answer 5

Now you just need to plug your values into your calculator :) \[C= 2 \cdot \pi \cdot 5\]

Answer 6

Do not round your value of \(\pi\) when doing so .

Answer 7

What do you get? :)

Answer 8

31.4 is that correct?

Answer 9

Yes it is :) Good job!

Answer 10

Thanks a lot :D

Answer 11

No problem :)