Question

Which of the following is the best estimate of the circumference of a circle that has a diameter of 7 feet?

11 ft
14 ft
42 ft
21 ft

Answer 1

Well since Circumference around a circle is the same as pi times the diameter of the circle, we can just multiply the diameter by pi to get the circumference!

Since we're just estimating, a good way to round off pi, which is 3.1415.... you can just use 3 instead since it's close enough.

Answer 2

would it be 21.98 cuz u do 3.14X7=21.98

Answer 3

Hint formula for circumference is 2*pi*r

Answer 4

? @ankit042

Answer 5

you forgot to mutily by 2

Answer 6

oh k thx

Answer 7

@ankit042 that's wrong. She was given diameter, not the radius.

The correct answer will be:

3*7=21

Answer 8

so 21 is right? @Kainui

Answer 9

@loveya6638 yeah

Answer 10

ok

Answer 11

Sorry I made the mistake