Circumference,Radius, Diameter

posted by .

The circumference of a circle is 12.56 centimeters. What is the approx. measure of the circle's radius?

A. 2
B. 2.5
C. 4
D. 8

I think that the Diameter would be 4.18 so the radius would be 2.04 or rounded to 2.

  • Circumference,Radius, Diameter -

    You are correct that the answer is 2 but you didn't work it properly. You divided 12.56/3 = 4.18, took 1/2 of that to obtain 2.09 and rounded to 2.00. BUT, pi is 3.14 which gives 12.56/3.14 = 4.00 and that divided by 2 = 2.00. Your teacher may have told you to use 3 for pi but I'm just pointing out that there are more significant figures in 12.56 than one.

  • Circumference,Radius, Diameter -


  • Circumference,Radius, Diameter -


  • Circumference,Radius, Diameter -

    well the answer i got was 8 because mulitilple the it

  • Circumference,Radius, Diameter -

    How to be sexy

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. math

    how do you find the diameter of a circle if you don't have the radius?
  2. Math--need help fast

    If the radius of a circle is x/6, what's the diameter and circumference?
  3. Circumference and Area of Circles

    can someone help me with these:Find the radius, diameter and circumference of a circle with an area of 64 cm2. Write your answers as decimals rounded to the nearest hundredth. Find the circumference and area of a circle that has a …
  4. math

    Okay. So i'm doing this project for my geometry class about different sports, soccer, baseball, basketball, bowling, golf, volleyball and pool. I have to find the surface area, volume, diameter, circumference, and radius of each of …
  5. Algebra

    The Circumference and area of a circle of radius r are givin by 2 [pie] r and [pie] r[2], respectively use 3.14 for the constant [pie] A. What is the circumference of a circle with a radius of 2 m?
  6. math

    I'm asked to find the circumference of a circle to the nearest tenth and the area of the same circle to the nearest hundredth. The circle has a diameter of 30 and a radius of 15. I got a circumference of 94.2 and an area of 188.48cm2 …
  7. Physics

    you measure the diameter of a circle then you calculate the radius of the circle using this diameter. (1) Which one has a greater uncertainty, the diameter or the radius?
  8. Math

    23.What is the approximate circumference of a circle with a radius of 6 centimeters?
  9. Math

    23.What is the approximate circumference of a circle with a radius of 6 cmA.12cm B.18cm C.24cm D.36cm D 24.What is the length of the diameter of a circle with a 15 radius A.5 B.15 C.30 D.45 C
  10. science

    mountain bike wheel has diameter of 40 inches , in how many turns will the bike be able to cover 1 km?

More Similar Questions