How do you find the perimeter of a circle?

Question

anonymous · Answer

Perimeter (circumference) of a circle = 2(pi)(radius)

anonymous · Answer

Do you have to divide it by anything?

anonymous · Answer

Just 2(pi)(radius)

anonymous · Answer

Ohkay, thank you ^^

anonymous · Answer

If you are given the diamter, then the radius = 1/2 the diameter

anonymous · Answer

welcome.

anonymous · Answer

the instructions say to use 3.14 instead of pi. So I do 2*3.14*6 (The radius) and the answer that it gives me isn't one of the choices. Have I done something wrong?

anonymous · Answer

If the radius of the circle is 6, then the circumference will be 2(3.14)(6), if you were told to use 3.14 for pi.

anonymous · Answer

Which happens to be 37.68

anonymous · Answer

And that's not one of the answer choices..

anonymous · Answer

What is the exact question you have to answer?

anonymous · Answer

"Find the approximate area and perimeter of the small sector in the figures to the nearest hundreds. Let pi =3.14"

anonymous · Answer

diagram?

anonymous · Answer

|dw:1384039495015:dw|

anonymous · Answer

I've already found the area of each circle. It's just the perimeter is giving me a bit of a fuss

anonymous · Answer

Thats a totally different question than you asked. You orginally asked for the circumference of a circle whose radius is 6.

anonymous · Answer

I asked to find the perimeter of the circle.

anonymous · Answer

Those are the diagrams they gave me and I have already found the area of the 2 circles.

anonymous · Answer

The perimeter of a circle = 2(pi)(radius).

With the diagram, thats a different question.

anonymous · Answer

How so?

anonymous · Answer

In the diagram question, you dont want the circumference of the entire circle, you probably want the circumference of part of the circle...the given arc.

anonymous · Answer

In that case, you use n/360 times 2(pi)(radius)

where n = # of degrees in central angle.

So in your diagram to the left, the length of the arc = 68/360 times 2(pi)(radius).

anonymous · Answer

Oh ....

anonymous · Answer

The perimeter or circumference of an entire circle is 2(pi)(radius).

If you want the circumference of "part" of the circle, then use the formula I just gave you in my lat post.

anonymous · Answer

Thank you.

anonymous · Answer

welcome.