Question

Use the given circle. Find the length s to the nearest tenth.


A. 6.3 m
B. 2.0 m
C. 3.1 m
D. 12.6 m

(working on the graph)

Answer 1

@bea_is_here @Brill @SolomonZelman @Serenity74

Will someone please help me

Answer 2

Sure

Answer 3

Umm is the angle 2pi/3?(just making sure)

Answer 4

yes

Answer 5

Ok so how many radians are there in a circle? (Like there are 360 degrees in a circle)

Answer 6

4?

Answer 7

Umm no, hint: it is in terms of pi

Answer 8

If you don't know it's fine, just ask

Answer 9

...3.14?

Answer 10

Yeah no
there are 2pi radians in a circle

Answer 11

Ok wait before we go any further
Are you more comfortable in degrees than radians?

Answer 12

yea

Answer 13

Ok then let's convert 2pi/3 into degrees
That's 120 degrees
Because pi= 180 degrees, then 2 x 180=360, 360/3= 120

Answer 14

Right?

Answer 15

i believe so

Answer 16

Ok so let's back up a second
What's the formula for the circumference of a circle?

Answer 17

pi right?

Answer 18

Umm not quite

Answer 19

i dont know :(

Answer 20

\[2\pi r\] ring a bell?

Answer 21

With r standing for the radius?

Answer 22

yea

Answer 23

OK so what's the radius of this circle?

Answer 24

that would be 2pi times 4 right?

Answer 25

@Brill

Answer 26

im just going to guess thanks for you help tho

Answer 27

Oh my goodness I am SO sorry I had to leave and I left without telling you