Question

Circle A has a diameter of 7 inches, a circumference of 21.98 inches, and an area of

38.465 square inches. The diameter of circle B is 6 inches, the circumference is 18.84

inches, and the area is 28.26 square inches.

Answer 1

Part A: Using the formula for circumference, solve for the value of pi for each circle.

Part B: Use the formula for area and solve for the value of pi for each circle.

Part C: What observation can you make about the value of pi for circles A and B?

Answer 2

Circumference = pi * diameter
21.98 = 7 * pi

solve for pi

Answer 3

solve for pi? pi = 3.14, do i just pretend i dont know what pi is? as if pi were X?

Answer 4

yea

7 pi = 21.98

divide both sides by 7:-

pi = 21.98 / 7

Answer 5

oh its a one step equation

Answer 6

right

Answer 7

lol 21.98/7 = 3.14

Answer 8

@agent0smith

Answer 9

@Sachintha

Answer 10

What are you stuck on?

Answer 11

all of it - not pphalk

Answer 12

i kinda got part a down tho

Answer 13

lol i miss pphalke.

Part B is almost the same as A, except \[\large Area = \pi r^2 \]

Answer 14

i find the area of the circles?

Answer 15

They gave you the areas "Circle A has a diameter of 7 inches, a circumference of 21.98 inches, and an area of 38.465 square inches"

Answer 16

yeah

Answer 17

Plug in the area for A (38.465), and radius for A (3.5) into the area formula and solve for pi.

Answer 18

I got 3.14 for part A and B but dont know how to show the work

Answer 19

Circle A
38.465 = pi*3.5^2

Circle B
28.26 = pi*3^2

solve for pi in both

Answer 20

i dont understand it

Answer 21

38.465/7

Answer 22

38.465 = pi*3.5^2

38.465/(3.5^2) = pi

and

28.26 = pi*3^2

28.26/(3^2) = pi

Answer 23

38.465/7 = 5.495

Answer 24

Are you doing part a or part b? The work i showed above is part b

Answer 25

OHH

Answer 26

can you help me with part C

Answer 27

It's just asking you to comment on the pi you got for part a and b, for the circles

Answer 28

pi was the same for both circles though

Answer 29

Then just say that

Answer 30

thanks dude