Question

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Answer 1

So, what is the formula for area of a circle?

Answer 2

sorry, formula for circumference?

Answer 3

2 * pi * radius right?

Answer 4

PB=radius, C=2*pi*radius=2pi29

Answer 5

\(\rm \large Formula ~for~ Circumference ~of~ a ~Circle\)

C = 2pi*r

r = radius = 29

So now we have

C = 2*3.14*29

Answer 6

Right. So if the radius is given to be 29, what is the circumference?

Answer 7

That is correct @lily1021 ! Good job, so can you find the radius here?

Answer 8

Yes, so what do you get?

Answer 9

It is 182.12 then?

Answer 10

Correct!

Answer 11

C = 182.12

Answer 12

well, you said you have to express your answer in terms of pi, so no @lily1021, go back a step

Answer 13

\(\large C=2\pi r\rightarrow 2\pi(29)\rightarrow 58\pi\)

Answer 14

Ah I forgot about that :( Oops!

Answer 15

when you substitute in your radius value, what do you get
?

Answer 16

The radius is 29 .

Answer 17

ok, so if you put 29 into your formula for circumference, what do you get?

Answer 18

(You don't need a calculator here)

Answer 19

So I do 2pi *29 which gives me 58pi?

Answer 20

right ^

Answer 21

that is correct, because multiplication is commutative so you are able to rearrange it to 2*29*pi :)

Answer 22

Hold on I'm not really understanding how that changes to 58.

Answer 23

ok, so, what is 2*29=?

Answer 24

Ohhh I see okay I see. I was adding the pi in it as was just getting the original answer I had. Alright thanks. :)

Answer 25

ahh ok, np :) happy you wanted to understand not just get an answer. Keep up the good learning!

Answer 26

Thanks for going through it with me. I appreciate it :)

Answer 27

^.^ yw