Question

If the circumference of the circle below is 42 cm, what is the length of ?

Answer 1

@Hero

Answer 2

Something's missing bro.

Answer 3

im looking for length of acr ab @Hero

Answer 4

@Danny_Boy do you know the formula?

Answer 5

@Danny_Boy you need to make sure you're posting your problems completely and clearly.

Answer 6

I think you mean you're looking for the length of arc ab.

Answer 7

would it be length of arc AB \[\frac{ mAB }{ 360 } x \pi r ^{2}\]

Answer 8

By the way:

\[\frac{120}{360} = \frac{x}{42}\]

Answer 9

Find x

Answer 10

@Hero you sure?

Answer 11

@Luigi0210, do you think your formula is the only formula to solve it?

Answer 12

You should try solving for x first

Answer 13

what formula do i use :/

Answer 14

Just follow Hero for now

Answer 15

Besides, @Luigi0210, your formula isn't right. Neither the area nor the radius is given.

Answer 16

I didn't give a formula Hero.

Answer 17

Oops, my bad.

Answer 18

should pi be in place of x :/

Answer 19

I suppose neither of you are familiar with this proportion:

\[\frac{\text{arc measure}}{360} = \frac{\text{arc length}}{\text{circumference}}\]

Answer 20

im not :/

Answer 21

Solve for x to get the arc length of AB

Answer 22

ok so after dividing i get 0.33 :/

Answer 23

How? You should have reduced 120/360 to get 1/3

Then you should have

\[\frac{1}{3} = \frac{x}{42}\]

From there, you cross multiply and solve for x.

Answer 24

ohhhh i c
42=3x :/

Answer 25

after that i divide right...... and i get 0.07 :/

Answer 26

You might need to work on your division skills.

Answer 27

\[\frac{42}{3} = 14\]

Answer 28

ahhh true i did some thing wrong :P

Answer 29

Calc fail

Answer 30

lol ahhh i got it now thank u :D

Answer 31

Bro, you should fix that problem you have before you mess up on a test.

Answer 32

yeah i will have tio go over and fix every thing thanks though