Question

Which circles have a circumference of 20 pi units?

Choose all answers that are correct.

A.
a circle with a diameter of 40 units

B.
a circle with a radius of 10 units

C.
a circle with a diameter of 20 units

D.
a circle with a radius of 20 units

Answer 1

@iGreen @AnswerMyQuestions this is my last question

Answer 2

I think something is missing from your question...

Answer 3

like what

Answer 4

Like in between pi and units

Answer 5

Is there anything missing?

Answer 6

no thats my bad to many spaces

Answer 7

xd

Answer 8

I think I know how to find the answer, but not so sure.

Answer 9

@welshfella

Answer 10

oh so what do you think?

Answer 11

circumference = 2*pi*r where r is radius

Answer 12

so if radius = 10 then circumference = 2*pi*10 = ?

Answer 13

also remember that the radius = half the diameter

Answer 14

@welshfella What does it mean by 20 pi units?

Answer 15

That's what I'm stuck on.

Answer 16

2 * pi *10 = 20pi units

Answer 17

20 pi = 20 times pi

Answer 18

That's what I thought. :P

Answer 19

yes the multiply sign is understood ( left out)

Answer 20

so what are the answers @AnswerMyQuestions

Answer 21

@iGreen

Answer 22

\(\color{blue}{\text{Originally Posted by}}\) @welshfella
2 * pi *10 = 20pi units
\(\color{blue}{\text{End of Quote}}\)

Answer 23

Hmm, @welshfella could you explain? I'm a little busy. :/

Answer 24

the answers are b and c @AnswerMyQuestions

Answer 25

They are?

Answer 26

@naterboss - I've given you one answer already

Answer 27

yes

Answer 28

2*pi*10 = 20pi

Answer 29

thanks for the help and i got a 100

Answer 30

now check to see if any of the other options have a radius of 10
- remembering that the diameter is 2 * radius

Answer 31

yw