Question

Circle A is shown with a central angle marked 37 degrees and the radius marked 10 inches.

Which of the following could be used to calculate the area of the sector in the circle shown above?

π(10in)237 over 360
π(10in)37 over 360
π(37in)210 over 360
π(37in)10 over 360

Answer 1

im a noob a math

Answer 2

*at*

Answer 3

Hint:

area of slice = \(\LARGE \frac{x}{360}*\pi*r^2\)

x is the angle in degrees
r is the radius

Answer 4

i don't understand how to use pi in equations

Answer 5

what I would do is pull out the pi and ignore it temporarily

Answer 6

In this case, x = 37 degrees and r = 10

if r = 10, then what is the value of r^2 ?

Answer 7

100

Answer 8

so x*r^2 is 3700?

Answer 9

someone help me

Answer 10

:(

Answer 11

so,

\[\Large \frac{x}{360}*\pi*r^2 = \frac{37}{360}*\pi*10^2\]
\[\Large \frac{x}{360}*\pi*r^2 = \frac{37}{360}*\pi*100\]

then you can rearrange terms

Answer 12

hmm strange how none of the answer choices match

Answer 13

well i don't know which one

Answer 14

i asked one of my friends and he has no clue

Answer 15

can you post a screenshot of the full problem?

Answer 16

how im using a mac i don't know how

Answer 17

http://www.take-a-screenshot.org/

click on the "mac" tab to have the instructions shown

Answer 18

here?

Answer 19

wait

Answer 20

on the link I posted. They show the instructions on how to take a screenshot

Answer 21

it doesn't work i tried all of them

Answer 22

did you hold the command key and shift key, then press the "3" key? (the '3' over the 'w' and 'e')

you should see a new pic file show up on your desktop

Answer 23

yes

Answer 24

ok post that by attaching the file (click the attach file button under the text box)

Answer 25

well no picture but i tried and it didn't work

Answer 26

the file name will be something like `Screen shot 2015-08-31 at 08.45.00 AM.png`

Answer 27

no its not working

Answer 28

ok nvm then

Answer 29

what do i do now with the equation?

Answer 30

sorry I don't know. None of the answer choices match what I wrote above, so I'm stumped. I think there's a typo maybe?

Answer 31

that's why I wanted to see the screenshot so I could see if anything was missing or not

Answer 32

yay

Answer 33

can you post an image of the answer choices as well?

Answer 34

only like that

π(10in)237 over 360
π(10in)37 over 360
π(37in)210 over 360
π(37in)10 over 360

Answer 35

the question says:

Which of the following could be used to calculate the area of the sector in the circle shown above?

Answer 36

does any of the answer choices have \(\Large 10^2\) in it?

Answer 37

the first 2

Answer 38

so choice B is \[\Large \frac{\pi(10^2)37}{360}\] ??

Answer 39

no lemme make that equation wait a sec

Answer 40

crud its not working its just pi*10*(37/360)

Answer 41

or the 2nd one just with 10^2 instead of 10

Answer 42

ok, so the "10" should be "10^2" because of the r^2 in pi*r^2

Answer 43

ok

Answer 44

look:
π(10in^2)237 over 360
π(10in)37 over 360
π(37in^2)210 over 360
π(37in)10 over 360

Answer 45

are you here?

Answer 46

so strange, it shouldn't be 10in^2 it should be 10^2 in^2

maybe that's what they meant?