Question

please help im not good a math
the circumference of a circle is 18n inches. Find its radius and area
The radius of the circle is

Answer 1

the circumference =2*pi*r ,18=2pi*r ,if u devide by 2 pi you get r=8/pi
now only you have to subtitute r in the equation of the area which is Area=pi*(r^2)

Answer 2

what don't you understand on how to solve this problem... do you understand on how to set the problem up? because i think Ahmad 1 is right on his/her explanation

Answer 3

no i dont understand how to solve it

Answer 4

ok lets give me one sec

Answer 5

ok you have 18 inches as the circumference and you are trying to find the radius right? and then by finding the radius you are trying to find the area

Answer 6

yes

Answer 7

ok so there are two formulas for circumference: c=2*pi*2 and c=d*pi right?

Answer 8

yes

Answer 9

ok so use the formula c=2*pi*r since you want the radius. substitute c for 18 since you already have that piece of information. you will then set up the formula as 18=2*pi*r ok?

Answer 10

okay

Answer 11

ok so all that is left to do is to divide 18 by 2 then by pi... because by doing so you will get the radius.... then you can go on to find the area because you have the radius....did i explain it well?

Answer 12

if you don't get it it is ok it is a lot of information to take in and trying to solve

Answer 13

im trying to im just not that good at math

Answer 14

it's ok... i hope i'm helping you not confusing you even more... :)

Answer 15

no your not confusing me

Answer 16

ok good cause i was like i hope i'm helping! lol

Answer 17

so once you divide 18 by 2 then you have the answer

Answer 18

yes but don't forget to divide it by pi also because you don't want to end up having pi and r on the same side....

Answer 19

that is what i think if you want to be extra sure than i suggest you to ask your teacher.... but if i'm not mislead then this is the right way..

Answer 20

I divided it and i got 9 I am not sure if it is right

Answer 21

did you divide it by pi after dividing it by 2?

Answer 22

yes

Answer 23

i got 0.5

Answer 24

ok so did you get the radius to be around 2.86 or 2.87?

Answer 25

2.86

Answer 26

ok so you did get 2.86?

Answer 27

yes

Answer 28

oh ok that's what i got so now that you have the radius you just plug it into the area formula to get your area and your done! :)

Answer 29

okay

Answer 30

okay well i hope i helped you! :) good luck!

Answer 31

thank you

Answer 32

no problem! :)