Question

http://prntscr.com/b3gt28
2 more questions after this

Answer 1

@jim_thompson5910

Answer 2

What is the area of the whole circle?

Answer 3

something eww

Answer 4

81pi

Answer 5

360

Answer 6

I mean

Answer 7

Yeah, 81pi.

9x9

Answer 8

Area of full circle = 81 pi
Central Angle = 45 degrees (180 - 35 = 45)


\[\Large \text{Area of Sector} = \frac{\text{Central Angle}}{360}*(\text{Area of Full Circle})\]


\[\Large \text{Area of Sector} = \frac{{\color{red}{\text{Central Angle}}}}{360}*({\color{blue}{\text{Area of Full Circle}}})\]


\[\Large \text{Area of Sector} = \frac{{\color{red}{45}}}{360}*({\color{blue}{81\pi}})\]


I'll let you finish

Answer 9

(180 - 35 = 45)
how can you explain please

Answer 10

oh ok

Answer 11

oops typo, I didn't realize I wrote `(180 - 35 = 45)` when it should have been `(180 - 135 = 45)`

Answer 12

oh ok, first i thought it was something i didnt learn yet

Answer 13

I understand so far

Answer 14

what is 45/360 equal to @Kikuo ?

Answer 15

45/360= 9/72?

Answer 16

.125

Answer 17

multiply `0.125` with `81` to get what?

Answer 18

whatever that result is, just tack on pi

Answer 19

how you highlight?

Answer 20

Why are we multiplying by 85?

Answer 21

see the link

http://prntscr.com/b3h18w

Answer 22

81 not 85

the full circle has 81pi as the full area

Answer 23

'thanks'

Answer 24

you're using the wrong tick mark

Answer 25

`oh yeah`

Answer 26

Why aren't we taking .125 away from 81?

Answer 27

because we're taking a fraction of the full circle

example: if we spit the circle into 3 equal pieces, and we want the area of one of the pieces then

area of one slice = (1/3)*(area of full circle)
area of one slice = (1/3)*(81pi)
area of one slice = 27pi

Answer 28

Aw that makes sense.
So, 10.125

Answer 29

yep the area of that slice is \(\Large 10.125\pi\)

Answer 30

Alright! Moving on.