1. Maths

    Pie=circumference of circle / Diameter of circle Then why pie is irrational no.

    asked by Sushma on July 4, 2018
  2. 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? B.What is the area of a circle with a radius of 2 m? C.

    asked by Jordan on September 17, 2007
  3. Math

    What's the circumference of a circle with a diameter of 7. Using pie as 3.

    asked by Bee on December 14, 2010
  4. Math

    The circumference of a circle varies directly from its diameter. If the circumference of the circle having a diameter of 7cm is 7 cm, what is the circumferences of the circle whose diameter is 10cm? 18cm? 20cm? a. Write a mathematical statement that relate

    asked by Jennylyn on September 19, 2015
  5. math

    The circumference of a circle varies directly from its diameter. If the circumference of the circle having a diameter of 7cm is 7 cm, what is the circumferences of the circle whose diameter is 10cm? 18cm? 20cm? a. Write a mathematical statement that relate

    asked by =) on August 21, 2014
  6. math

    Find the circumference of the circle. using 3.14 as pie and round to the nearest hundredth. The diameter is 14.9 in

    asked by max on March 29, 2016
  7. math

    What is the circumference of the circle if the diameter is 63ft. use 3.14 for pie and round to the nearest hundredth.

    asked by max on March 29, 2016
  8. math

    how do you find the diameter of a circle if you don't have the radius? the circumference is 628 cm. Divide the circumference by pi, which is 3.14 (approximately). That will give you the diameter. Circumference = pi * D

    asked by prince on February 15, 2007
  9. Algebra

    The circumference of a circle is found by the formula C=pi(d) where d is the diameter of the circle. Does circumference vary directly as diameter? If so what is the constant of variation

    asked by M on October 14, 2014
  10. college algebra

    The diameter of the Earth is approximately 7,920 miles. Given that the circumference of a circle is pi times its diameter, which statement best describes the length of a trip from Washington to Masdagascar that is approximately 8,600 miles long? a.One

    asked by Anonymous on August 29, 2006
  11. Math

    The radius of a circle is decreasing at a constant rate of 0.1 centimeters per second. In terms of the circumference C, what is the rate of the area of the circle, in square centimeters per second? a. -(0.2)pie C b. -(0.1)C c. -(0.1)C/2 pie d. (0.1)^2C e.

    asked by Naz on January 18, 2011
  12. AP Calculus

    The radius of a circle is decreasing at a constant rate of 0.1 centimeters per second. In terms of the circumference C, what is the rate of the area of the circle, in square centimeters per second? a. -(0.2)pie C b. -(0.1)C c. -(0.1)C/2 pie d. (0.1)^2C e.

    asked by Naz on January 18, 2011
  13. AP Calculus

    The radius of a circle is decreasing at a constant rate of 0.1 centimeters per second. In terms of the circumference C, what is the rate of the area of the circle, in square centimeters per second? a. -(0.2)pie C b. -(0.1)C c. -(0.1)C/2 pie d. (0.1)^2C e.

    asked by Naz on January 18, 2011
  14. Math

    Students in Mr.Tandoc's shop class made a circular railroad crossing sign for a school play. The diameter of the sign was about 4 feet. How does the diameter compare to the circumference of the sign? A.The diameter is about 1/3 of the circumference B.The

    asked by Jerald on January 26, 2013
  15. Math

    Students in Mr. Tandoc's shop class made a circular railroad crossing sign for a school play. The diameter of the sign was about 4 feet. How does the diameter compare to the circumference of the sign? A. The diameter is about 1/3 of the circumference B.The

    asked by Jerald on January 28, 2013
  16. Math--need help fast

    If the radius of a circle is x/6, what's the diameter and circumference? Diameter = 2*r Circumference = 2*pi*r ...or... Circumference = pi*d Note: I'm using * to mean multiply. Can you now determine what you need to know with this information? Not really.

    asked by Emily on March 7, 2007
  17. 8th grade

    c (circumference) c=pie d where d is the diameter. How do i find d to the nearest hundredth when c=39cm? and i have to solve the formula C=pie d for d.

    asked by tito on October 14, 2008
  18. Math

    Jason drew two circles. the diameter of the larger circle is twice the diameter of the smaller circle. What is the ratio of the circumference of the smaller circle to the circumference of the larger circle?

    asked by Anonymous on March 30, 2014
  19. math

    the radius of semi circle is 30 cm.Find its circumference Note:what formula can i use (pie*r + 2r) or (pie*r + r)

    asked by kelvin on August 15, 2016
  20. Math

    A circle has an area of pie cm square what is its circumference in terms of pie

    asked by Chimi on August 4, 2015
  21. 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 the balls. I got a

    asked by Emily on May 23, 2007
  22. geometry

    how do you find the circumference of a circle with the area of 169 pie m squared(in the terms of pie)? Please tell me how to do it. Don't just give me the answer

    asked by jordan on January 12, 2009
  23. math

    a percan pie 40 ft in diameter was baked in oklahoma,in 1989. What was the pie circumference ,rounded to the nearest foot? plz shoe work

    asked by daisy on March 1, 2011
  24. Geometry

    I need help on a problem that's on formula for circumference. A circle has a circumference of 36 cm. find it's radius .but it says give an exact answer in simplest form and it says enter pi for the symbol of pie .

    asked by Nancy on June 22, 2012
  25. Physics

    I have to design a laboratory activity to answer the question, "What is the relationship between the diameter of a circle and the area of the circle?" My teacher said to use a previous activity as a templete to help me. For the previous activity you had to

    asked by Jim on April 1, 2009
  26. 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 with these formulas:

    asked by jon on December 16, 2009
  27. math

    A segment with endpoints C(-3, 3)and D(7, 3) is the diameter of a circle. a. What is the center of the circle? b. What is the length of the radius? c. What is the circumference of the circle? d. What is the equation of the circle?

    asked by Joshua on March 21, 2018
  28. Math

    the ratio of circumference of a circle to its diameter is 22:7. what is the circumference of a curcle of the diameter 15.6m?

    asked by Silvanus on April 15, 2013
  29. math

    The diameter of the Earth is approximately 7920 miles. Given that the circumference of a circle is _ times its diameter, which statemnt best describles the length of a trip from Washington to Madagascar that is approximately 8600 miles long? Your question

    asked by trina on August 25, 2006
  30. Math

    If the circumference of a circle is 18 ( pie symbol), what is the area of the circle? Thanks

    asked by Mom B on April 8, 2014
  31. Math

    For any circle, which ratio is equal to the number π? Select all that apply. ***A. Circumference ------------------- Diameter B. Circumference ------------------- Radius ***C. Circumference ------------------- 2 Times Radius D. Radius Squared

    asked by Jaxx on August 30, 2019
  32. math

    How is the circumference of a circle with radius 9cm related to the circumference of a circle with diameter 9cm? i don't understand this.Help?? Thanks:)

    asked by jamie on November 26, 2008
  33. math

    Sorry I'm posting again-- I just thought it would increase my chances of getting my question answered if i posted it in the mathematics portion of the website also. --------------------------------------- One can of pumpkin pie mix will make a pie of

    asked by Emily on March 8, 2008
  34. 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 rectangle inscribed

    asked by mike on May 8, 2007
  35. geometry

    A pizza has a diameter of 12 . What is its circumference? Use the value for 3.14 , for pie

    asked by Anonymous on February 4, 2011
  36. geometry

    A pizza has a diameter of 12 . What is its circumference? Use the value for 3.14 , for pie

    asked by Anonymous on February 4, 2011
  37. Math

    Differentiate 2 pie r .i.e circumference of a circle

    asked by Afeez on March 11, 2016
  38. math algebra?

    A circle has circumference of 56.52 ft. What is its area? Use 3.14 for pie.

    asked by Lycia on June 3, 2014
  39. Geometry

    One can of pumpkin pie mix will make a pie of diameter 8 in. If two cans of pie mix are used to make a larger pie of the same thickness, find the diameter of that pie. Use sqrt 2 is equal to about 1.414

    asked by Emily on March 8, 2008
  40. geometry

    The radius of a circle is 10. Using π, which equation expresses the ratio of the circumference of the circle to the circle's diameter? please help me

    asked by help please?? on March 29, 2018
  41. 9th grade

    the circumference of circle j is 24 pie. what is the perimeter of jkl

    asked by Nathan on November 18, 2010
  42. math

    how do i solve the problem what is the radius of a circle with a circumference of 24 pie

    asked by Laney on September 27, 2008
  43. Math

    23.What is the approximate circumference of a circle with a radius of 6 centimeters? A.12 B.18 C.24 D.36 D 24.What is the length of the diameter if the radius is 15? A.5 B.15 C.30 D.45 C 27.What is the circumference of the circle velow if it has a radius

    asked by Jerald on March 23, 2013
  44. math

    what is the diameter of a circle whose circomfrence is about 15.7 cm. divide the circumference by PI Divide the circumference by pi = 3.1416 to get the diameter

    asked by butt on December 5, 2006
  45. Geometry

    Find the radius of a circle whose circumference is 37.3cm (Take pie =3.14cm)

    asked by Yukti behl on November 4, 2016
  46. math

    find the area and circumference of the circle. Use 3.14 for pie and round to the nearest hundreth

    asked by max on March 29, 2016
  47. math

    The number of square units in the area of circle P is equal to the number of units in the circumference of circle P. Assuming that the diameter of the circle must be greater than P, what is the radius of circle P ? a. 2 b. 2 pi c. 4 d. 4 pi e. cannot be

    asked by Thomas on December 8, 2013
  48. Math

    42is the diameter of a circle. Find the circumference of the circle to the nearest foot.

    asked by Latoya on April 6, 2016
  49. Math

    The area of a circle is given by the expression pi(16x^2 - 40x + 25) . a) What is the diameter of the circle? b) What is its circumference?

    asked by Henry P on May 27, 2012
  50. Geometry

    The endpoints of the diameter of a circle are at (1, 2) and (7, -6). What is the circumference of the circle, to the nearest tenth of a unit? 15.7 31.4 62.8 78.5 Please help?

    asked by SkatingDJ on September 23, 2015
  51. geometry

    The endpoints of the diameter of a circle are at (1,2) and (7,-6). What is the circumference of the circle, to the nearest tenth of a unit.

    asked by katy on September 15, 2015
  52. Math

    The diameter of a circle is 7 inches. What is the circumference of the circle rounded to the nearest thousandth?

    asked by Anonymous on July 9, 2011
  53. math

    which of the following of a circle is always smaller than the other two? A the circumference B the diameter C the radius D it depends on the size of the circle

    asked by zaira on October 27, 2008
  54. Algebra

    The circumference,y, of a circle varies directly with the diameter,x, of the circle. Write an equation if y=44cm when x=14cm.

    asked by Austin on May 17, 2010
  55. Geometry

    the endpoints of the diameter of a circle are at (1,2) and (7, -6). what is the circumference of the circle, no the nearest tenth of a unit? 15.7 31.4 62.8 78.5 I was thinking B? i want to check.

    asked by Roi on September 16, 2015
  56. math

    2/3x+5/3x=14 7\6x=14 then multiply a4 my 6\7 what is the circumferenceof a satellite dish which has a diameter of 21m you do 2 times pie and radius since you have the diameter then its 21 times pie . for futher info if your trying to find the area then you

    asked by Anonymous on April 24, 2007
  57. Precalculus

    A line segment has endpoints A=(1,3) and B=(13,19). a) Find the equation of the circle for which the segment AB is a diameter. Ans: (x - 7)^2 + (y - 11)^2 = 100 b) Accurate to the nearest tenth, the circumference of this circle is _______ ? I was able to

    asked by jh on March 9, 2010
  58. Math

    (Two concentric circles are shown)The smaller circle's circumference is 10pi. The chord's length is 24. What is the diameter of the larger circle.

    asked by Hannah Montana on May 23, 2011
  59. Math

    The diameter of a circle is 60cm.find the angle which an arc of length 3.14cm subtends at the circle take pie equals 3.142

    asked by Umaima on January 13, 2016
  60. Physics

    1. A Pyrex plate is filled to the brim with liquid pumpkin pie filling, then baked at 190 degrees Celsius. The pie plate is h=3.60 cm deep, but the sides of the dish taper from the top to bottom so that the bottom is a circle of diameter d2=25.8cm, while

    asked by Dawna on January 22, 2013
  61. 5th grade math

    The diameter of a penny is 3/4 in. How many pennies are needed to form a row 12in. long? Also to find the circumference of a circle do you use the radius or diameter x 3.14?

    asked by jill on December 7, 2010
  62. Math

    If the diameter of a circle is 22 cm, what is the circumference of the circle and the area of the circle

    asked by Carter on September 15, 2015
  63. math

    If a circle had a circumference of 8.4 cm, what is the diameter of the circle to the nearest 0.1 cm?

    asked by vincent on July 28, 2013
  64. Math

    1. estimate the circumference of the circle with the given radius or diameter use 3.14 round to the nearest unit 24 27-in 78-in 1,809-in 151-in 2. estimate the radius of a circle circumference of 272.2-in. use 3.14 to round to the nearest tenth.

    asked by Unbreall academy fan on April 4, 2019
  65. algebra

    Mrs Acres will draw a circle on the playground for a game in gym class.The circle will havw a diameter of 16 feet.What is the circumference of the circle that Mrs Acres will paint?

    asked by Katie on April 24, 2012
  66. Math

    What is the circumference of a circle with a diameter of 10 m.

    asked by peter on January 17, 2011
  67. Math

    What is the circumference of a circle with a diameter of 10 m.

    asked by nando on January 17, 2011
  68. 5th grade

    what is the circumference of a circle that has a diameter of 8 m

    asked by jessica on May 17, 2010
  69. math

    circumference of a circle with the diameter of 47.10?

    asked by Brenda on January 17, 2010
  70. Math

    What is the circumference of a circle with a diameter of 10 m.

    asked by will on January 17, 2011
  71. Math

    what is the circumference of a circle that has a diameter of 16 mi?

    asked by Judy on March 29, 2011
  72. geometry

    Given a circle with a diameter of 4, what is the circumference?

    asked by zaylee on October 2, 2012
  73. math/geometry

    if the circumference of a circle is 12.56 m then what is its diameter?

    asked by Anonymous on February 18, 2013
  74. math

    what is the circumference of a circle if 13 is the diameter

    asked by Alisha on February 21, 2010
  75. math

    what is the circumference of a circle with a diameter of 50 mm

    asked by Marc on May 21, 2016
  76. college math

    If a circle has the diameter of 8, what is the circumference

    asked by Debra on September 11, 2008
  77. math

    Mrs.penn has a circular tablecloth with a circumference of 29 feet. Which expression could be used ro find the radius of the tablecloth? f. 29 - 2 pie g. 29/2 pie h. 29/pie j 29 + 2pie

    asked by dylan on December 6, 2010
  78. Math

    1. estimate the circumference of the circle with the given radius or diameter use 3.14 round to the nearest unit 24 27-in 78-in 1,809-in

    asked by Conuxes user 2 on April 5, 2019
  79. math

    A gear on a bicycle has the shape of a circle. One gear has a diameter of 4 inches, and a smaller one has a diameter of 2 inches. Justin says that the circumference of the larger gear is 2 inches more than the circumference of the smaller gear. Do you

    asked by Tim on December 30, 2015
  80. Math

    Three circular pipes with 30cm diamters are strapped together. Find the length of the strap to the nearest centimeter. I got the circumference of the circle which is 94.25cm but that's where i got stuck. Can you please help? you are wrong sorry to tell ya.

    asked by Shay on April 4, 2007
  81. 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

    asked by Jerald on May 28, 2013
  82. math

    a race track is a mile around circle which equals 5,280 circumference. To find the diameter (the the width of the center of the circle) do I divide the 5,280 by 2?

    asked by Sandy on March 4, 2013
  83. physics

    what is the magnitude of the displacement of a car that travels half a lap along a circle of radius 150m? would the answer be half of the circumference or would it be the diameter of the circle?

    asked by Anonymous on October 19, 2008
  84. Math

    Find the circumference of the circle. Use 3.14 for π. Round to the nearest unit. (Show picture of circle with a diameter, with 21cm at one side) A) 24cm B) 66CM C) 125cm D) 69cm Please help me understand, that means don't tell me the answer without

    asked by Sliverstream on April 11, 2019
  85. prealgebra

    please help me to find the diameter and the radius of a circle with the given circumference of 2 mi.

    asked by mikey on April 30, 2018
  86. math

    what is the exact circumference of a circle with a diameter of 13 inches?

    asked by jenna on July 3, 2011
  87. geometry

    What is the exact circumference of a circle with a diameter of 15 inches.

    asked by angela on June 19, 2012
  88. boston high school

    find the circumference of a circle if the diameter is 5.15 meters

    asked by kels on December 9, 2015
  89. MATH

    FIND THE DIAMETER AND CIRCUMFERENCE OF A CIRCLE THAT HAS A RADIUS OF 1.7 USE 3.14 FOR PI

    asked by MASON on December 13, 2010
  90. math

    Estimate the circumference of the circle with the given radius or diameter. Use 3.14 for

    asked by aseease on April 24, 2016
  91. maths

    O is the centre of the circle and A and B are points on the circumference of the circle. The radians of the circle is 12 cm and the angle AOB is 54 degrees. Choose the one option which gives the length of the circle joining A and B , correct to one decimal

    asked by katie on April 20, 2007
  92. MATHS

    find the area of a circle with diameter 50cm (take pie as 22/7)

    asked by CHINELO on May 30, 2019
  93. Math

    Find the circumference of the circle. Use 3.14 for pi. Round to the nearest unit The circle only has the diameter which is 17cm Please do step by step so I understand it A)53cm B)227cm C)20cm D)27cm I think its B but I don't know. Please help

    asked by ♡school lover♡ on April 13, 2019
  94. math problem

    The diameter of a circle is increased by enough to increase the circumference by 20%. By what % is the area of the circle increased ? ( Hint: Try a number like t=5.)

    asked by Joel on February 17, 2013
  95. math

    the circumference of a circle is 120 millimeters. Which of the following inqualities is true for d, the diameter of the circle measured in millimeters? A. 10

    asked by mary on May 5, 2014
  96. Circumference,Radius, Diameter

    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.

    asked by Missy on March 24, 2008
  97. math

    A regular hexagon is drawn inside of a circle so that each of its vertices touches the circle. The diameter of the circle is 4 centimeters and the perimeter of the hexagon is 12 centimeters. How much longer is the circumference of the circle than the

    asked by Chris on April 30, 2014
  98. Math

    The formula to find the circumference of a circle that has a diameter of 34 inches?

    asked by Agustin on March 16, 2009
  99. Pre Algebra

    find the radius and diameter of a circle with a circumference of 63m

    asked by Gloria on April 12, 2011
  100. geometry

    The circumference of a circle is approximately 28.26 cm. Find its diameter and radius

    asked by Cynthia on November 2, 2010