Question

The width of the tiled portion is 2.5 feet. What is the area of the tiled portion of the patio, rounded to the nearest whole square foot?

Answer 1

can you calculate the area of a circle?

Answer 2

i got 28.26 when i did

Answer 3

take the area of the 18 foot circle, subtract the area of the 15.5 foot circle
then take half of that since it's a semicircle

Answer 4

to check it, if you want, think of it as a rectangle...
half the circumference of a 16.75 foot circle times 2.5
won't be exactly the same, but should be close

Answer 5

Was my area correct before? Just so I can make sure i'm doing it correctly

Answer 6

I got a much different answer, so maybe I am wrong, sorry

Answer 7

What formula did you use? I might have made a mistake

Answer 8

(3.14 x 18 x 18 - 3.14 x 15.5 x 15.5 ) /2

Answer 9

when i recalculated the area i actually just got 13.3

Answer 10

oh let me try that then

Answer 11

no, don't... I am wrong

Answer 12

the options i was given for the answer were:
5 square feet
8 square feet
33 square feet
61 square feet

and i'm unable to get any of them

Answer 13

I used the diameter instead of the radius... you were much closer

Answer 14

yes, it's an 18 foot circle and a 13 foot circle
so 9 and 6.5 for the radii

Answer 15

I need to get some sleep, but that will give you the right answer

Answer 16

i subtracted the first area 28.26 and the second area for the tiled area 20.41 and got 8? is that the correct way to do it?

Answer 17

take the area of the 18 foot circle
subtract the area of the 13 foot circle
divide by two (the picture is a semicircle)

Answer 18

then i got the answer of 24.335

Answer 19

how?

Answer 20

oh i accidentally hit addition, let me try that again

Answer 21

i got 7.85

Answer 22

what is the area of the 18 foot circle?
the radius is 9 remember

Answer 23

28.26

Answer 24

how did you get that?

Answer 25

9*3.14

Answer 26

area is pi r squared... need to multiply by 9 again

Answer 27

i got 254.34

Answer 28

3.14 * 9 * 9 - 3.14 * 6.5 * 6.5
and then divide that by 2

Answer 29

that sounds much better for the area of the big circle

Answer 30

i got 60.8

Answer 31

and thats one of the multiple choices so I think we did it right....

Answer 32

Hopefully, Thanks!