Question

Help with these twooo

Answer 1

Would this be C=2\[\pi\] r

Answer 2

There's a shorter way.

You know the whole circumference. The 70 degree arc is a 70/360 fraction of the whole circumference.

Answer 3

so divide it

Answer 4

change the angle to radians
then \[l=r \theta\]
where l is the length of arc
theta ,angle in radians
r=radius

Answer 5

this is general formula but you can use the method given by mr.agent0smith

Answer 6

So divide it

Answer 7

Multiply the fraction, by the circumference.

Answer 8

4.86

Answer 9

Second one you can use the formula sshayer gave. Or\[\large l = \frac{ \theta }{ 360}*2 \pi r\]

Answer 10

so its 70 over 360 right

Answer 11

This is the 2nd question now.

Answer 12

the first one is 4.86

Answer 13

Yes, we're on the 2nd now.

Answer 14

Okay lets continue

Answer 15

Plug in the angle, and the length into the formula i gave earlier. Solve for r.

Answer 16

14/360*155

Answer 17

No, the angle is the degrees. The length is in cm. r is what you need to find.
\[\large l = \frac{ \theta }{ 360}*2 \pi r\]

Answer 18

Sooo 155/360?

Answer 19

Well you have to plug everything in. Write out the whole equation.

Answer 20

155/360 * 14

Answer 21

That's not an equation.

Answer 22

Umm I have no idea then

Answer 23

\[\large 14 = \frac{ 155 }{ 360}*2 \pi r\]

Answer 24

There is no radius right

Answer 25

14=2.70

Answer 26

Where is your r...?

Answer 27

Its not even provided

Answer 28

Because you're supposed to solve for r. See the equation i gave above, with r.

Answer 29

5.18

Answer 30

Looks right

Answer 31

Dang, you're the best :)

Answer 32

:)