Question

Circle A has a diameter of 8 inches, a circumference of 25.12 inches, and an area of 50.24 square inches. The diameter of circle B is 3 inches, the circumference is 9.42 inches, and the area is 7.065 square inches.

Part A: Using the formula for circumference, solve for the value of pi for each circle. (4 points)

Part B: Use the formula for area and solve for the value of pi for each circle. (4 points)

Part C: What observation can you make about the value of pi for circles A and B? (2 points)

Answer 1

@AlexandervonHumboldt2

Answer 2

ok so the formula for the curcimfence is 2*pi*r
for the area is pi*r^2

Answer 3

circle A:
circumference: 25.12 inches. thus 2*4*pi=25.12
pi=3.14
area: pi*4^2=50.24 pi=50.24/16=3.14

Answer 4

circle B:
circumference: 2*1.5*pi=9.42 pi=9.42/3=3.14
area: 1.5^2*pi=7.065 pi=3.14

Answer 5

The number Pi is always the same. In any circle, pi is equal to 22/7 which is approximately 3.14

Answer 6

did you understood @geny55 ?

Answer 7

yes @AlexandervonHumboldt2

Answer 8

@AlexandervonHumboldt2

Answer 9

so whats the answer for part A? @AlexandervonHumboldt2

Answer 10

circle A:
circumference: 25.12 inches. thus 2*4*pi=25.12
pi=3.14
circumference: 2*1.5*pi=9.42 pi=9.42/3=3.14

Answer 11

does circle A mean Part A?

Answer 12

part b:
area: pi*4^2=50.24 pi=50.24/16=3.14
area: 1.5^2*pi=7.065 pi=3.14

Answer 13

wait so part A is :
circumference: 25.12 inches. thus 2*4*pi=25.12
pi=3.14
circumference: 2*1.5*pi=9.42 pi=9.42/3=3.14
@AlexandervonHumboldt2

Answer 14

yeah

Answer 15

ok .. part c?

Answer 16

The number Pi is always the same. In any circle, pi is equal to 22/7 which is approximately 3.14

Answer 17

ok thanks :)

Answer 18

np

Answer 19

are all of these answers in your own words?

Answer 20

of cousre!