Friday
April 18, 2014

Search: math/ CIRCUMFERENCE of a circle

Number of results: 218,270

7th grade
The formula for finding diameter is: Circumference = pi * d Therefore, insert your circumference, and divide by pi or 3.14 to get the diameter. For radius: Circumference = 2pi * r So, insert your circumference and multiply pi by 2. Then divide the circumference by 2pi to get ...
Tuesday, January 6, 2009 at 5:44pm by Caroleen

geometry
What is the circumference of a circle circumscribed about a square with a side length 24 m?
Thursday, February 26, 2009 at 10:07pm by Lauren

12th grade PYSICS
A motiom of an objects along the circumference of a circle.
Sunday, November 7, 2010 at 6:57pm by Yuvraj s borkar

Math
All of these questions have to do with the circumference of a circle. C = pi * d or C = pi * r^2 You can use either 3.14 or 22/7 for pi.
Wednesday, April 17, 2013 at 9:14pm by rbowh

geometry
This is a question that needs to be visualized. (I used to go to our teacher's staff room and bring back a cone paper cup from the water cooler and cut it open) One has to realize that the arclength of the sector becomes the circumference of the circle of the cone, and the ...
Thursday, April 15, 2010 at 12:01pm by Reiny

math
a circular track has a radius of 100ft. elena wants to run 2 miles. There are 5,280 ft in a mile. Can you find the circumference of a circle if you know the radius? explain your answer
Tuesday, March 1, 2011 at 8:43pm by daisy

math
Doesn't one revolution of a tire the same as its circumference? Isn't the circumference pi*d (not radius)?
Friday, October 12, 2007 at 12:12pm by Question?

Math
radius of first circle: πr^2 = 36π r^2 = 36 r = 6 radius of 2nd circle πR^2 = 18π R^2 = 18 R = √18 = 3√2 circum of first = 2π(6) = 12π circum of 2nd = 2π(3√2) = 6√2 π ratio of their circumference = 12π : 6&#...
Monday, July 23, 2012 at 11:27pm by Reiny

Math
what if you divide circumference by diameter and don't get pi ? What does that mean about the circle (because today i got numbers that were exactly over pi and some were even under)?
Thursday, March 14, 2013 at 6:01pm by Alexis Thompson

math
of course. A circle of radius 12 as circumference exactly 24π Of course, if you want an exact numeric answer, that's not possible, since the value of π is an unending decimal fraction.
Tuesday, February 11, 2014 at 5:36pm by Steve

MATHS
Find the radius of a circle with the circumference of 94.25cm correct to the nearest cm?
Wednesday, June 18, 2008 at 5:13am by Rhiannon

geometry
Which is the area of a circle with a circumference of 37.68 units? (use 3.14 for pi)
Tuesday, July 6, 2010 at 1:38pm by Superman

geometry
The circumference of a circle is approximately 28.26 cm. Find its diameter and radius
Tuesday, November 2, 2010 at 6:54pm by Cynthia

Algebra
For this circle, a 50 degree central angle cuts off an arc of 6 in. What is the circumference?
Wednesday, January 5, 2011 at 10:09pm by Ryland

HELP11
A line horizontally drawn from the center of the circle. A. Radius B. Axiom C. Circumference D. Vertex A
Sunday, February 19, 2012 at 7:09pm by kesha

math
base figures you need to know 5280 feet in a mile 12 inches in a foot 60 minutes in an hour The circumference of a circle formula is circumference = pi * radius * 2 the trick of this problem is you have feet in the mile but inches in the tire & hours in the speed but minutes ...
Tuesday, March 30, 2010 at 8:31pm by noel

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?
Tuesday, December 7, 2010 at 11:33pm by jill

physics
What is the circumference of the circle the end of the hand scribes? You are given the radius. speed=distance/time
Tuesday, November 4, 2008 at 12:44pm by bobpursley

geometry
What's the circumference of a circle whose area equals 20x 3.14 cm squared in centimeters?
Monday, September 7, 2009 at 7:28pm by Cindy

Geometry
Find the circumference of the circle (use 3.14) D=5.95yd Is the answer 18.683 yd?
Monday, November 7, 2011 at 6:13pm by Mindy

math
The radius has nothing to do with the height. It equals (circumference)/(2 pi) What they call the "distance around the cross section" is the circumference
Monday, November 10, 2008 at 10:47pm by drwls

math
You can check that. In google type: Circumference When you see list of results click on : Circumference-Wikipedia,the free encyclopedia
Monday, March 14, 2011 at 4:03pm by Bosnian

geometry
If you "open up" the paper cone you will have an obtuse-angled sector of a circle (looks like the old 'pac-man' shape) the radius of that sector is 112 mm , and the circumference of the circular base of the cone becomes the arc length of the sector. finding that arc length: ...
Tuesday, April 3, 2012 at 1:57pm by Reiny

math :(
You must mean : find the perimeter of a semicircle. perimeter = diameter + 1/2(circumference of circle) = 2(14) + (1/2)(2)(22/7)(14) = ....
Sunday, February 21, 2010 at 5:48pm by Reiny

math
This will be a circle with a circumference 2*pi*r=240-->r=120/pi (max)A=pi*r^2=14400/pi square feet
Thursday, April 28, 2011 at 3:52am by Mgraph

Math
Find the difference between the perimeter of a square of area 1 centimeter square and the circumference of a circle of the same area.
Wednesday, March 20, 2013 at 7:38am by Emily

Pre-Calc (Circles)
Describe the conditions necessary, where circle A has a larger radius than circle B, for the two circle to have no points of intersection, while circle B is entirely in the interior of circle A.
Tuesday, November 17, 2009 at 6:44pm by Anonymous

Math
Needing SERIOUS help with circumference and area circle-wise. Help? I'm not really sure where I'm messing up at, but could someone explain all the forumula stuff with area to me in layman's terms?
Wednesday, April 23, 2008 at 9:20pm by Anita Maureen

math
x^2 + y^2 - 8x -2y -3 = 0 the points S and T lie on the circumference of the circle. M is the midpoint of the chord ST. Length of Centre C to M is 2. whats the length of ST??
Sunday, February 13, 2011 at 3:05pm by Jack

math
Find the exact circumference of a circle with diameter equal to 8 ft. 8 ft. 16 ft. 64 ft. what equation would u use?
Monday, February 28, 2011 at 11:03am by danny

math
a circle of radius 21" has a circumference of 131.95" = 11 ft so, 11ft * 3400/min = 37400 ft/min
Wednesday, March 28, 2012 at 9:18pm by Steve

pre algebra
find the circumference and area of a circle if its diameter is 12 feet. round to the nearest tenth.
Wednesday, June 16, 2010 at 10:03pm by lavena

pre algebra
find the circumference and area of a circle if its diameter is 12 feet. round to the nearest tenth.
Wednesday, June 16, 2010 at 10:16pm by lavena

math
a circle has a circumference of 110.6mm find diameter to the nearest tenth A.35.2mm b.36.2mm c.37.2mm d.38.2mm
Saturday, January 16, 2010 at 11:41am by makeeda

geometry
An army base is enclosed by a wire fence so that it forms a circular compound. The entrance to the base is located at X(3, 6) and the exit is at Y(9, 14). X and Y are end points of a diameter of the circle. A search tower is positioned at Z(2, 13) on the circumference of the ...
Wednesday, July 11, 2012 at 10:18pm by Manda

math
did you mean the arc with a central angle of 270 degrees ? if so, find the circumference which is 2pi(16) then take 3/4 of that since 270 degrees is 3/4 around the circle.
Thursday, May 21, 2009 at 3:42pm by Reiny

math
27.What is the circumference of the circle below with a radius of 6yd. A.6pi yards B.12pi yards C.18pi yards C.36pi yards pi=3 for me right now
Tuesday, May 28, 2013 at 10:11pm by Jerald

Math
the circumference of the original circle becomes the arc length of the sector. circumf. of circle = 2πr = 24π arc = r, were is the central angle in radians and r is the radius so if r = 60 60 = 24π = 24π/60 radians = 2π/5 radians I know π/5 ...
Friday, December 9, 2011 at 9:47pm by Reiny

Math
The area of a circle is 16π cm2. What is the circle's circumference? 2π cm 4π cm 8π cm 16π cm
Friday, January 20, 2012 at 1:52pm by Callie

math
suppose you copy the circle using a size factor of 150%.what will bet he radius,diameter,circumference,and the area of the image? radius will be 1.5 times as big diameter will be 1.5 times as big but the formula for area will be pi times the radius squared. So calculate that ...
Thursday, October 26, 2006 at 9:45pm by chemiii

7th grade algebra
Find the area of the circle with the given circumference C Use 3.14 for pi C=37.68
Wednesday, May 20, 2009 at 9:57pm by Canyon

10th grade
If a circle has a diameter of 7inches, what is the circumference rounded to the nearest whole number? Use pi=3.14
Thursday, November 18, 2010 at 1:59pm by fay

TRIG
find the degree measure of a central angle subtended by an arc of 8.00cm in a circle with circumference 20.0cm
Tuesday, October 2, 2012 at 5:22pm by Mel

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. (0.1)^2 pie C
Tuesday, January 18, 2011 at 6:29pm by Naz

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. (0.1)^2 pie C
Tuesday, January 18, 2011 at 7:13pm by Naz

geometry
If a circle has an area of 25 pi cm squared, find the circumference of the circle? a. 5 squared cm b. 10 squared cm c. 50 sqaurred cm d. 156.25 squared cm
Thursday, May 3, 2012 at 3:35pm by Jessica

Shape and Space
The circumference of a mysterious crop circle measure 60 meters. What is the approximate radius,rounded to the nearest meter?
Monday, November 22, 2010 at 3:09pm by lululemon

Math
Area of circle = πr^2 Multiply by 2 to get top and bottom. Circumference = 2πr Area of side = 4 *2πr Combine the data.
Sunday, May 23, 2010 at 11:04pm by PsyDAG

Math
42.50 - 14.62 = 27.88 The circumference of a circle = 2 r pi The formula for the arc length of a circle: L = 2 r pi * theta / 360 = r pi * theta / 180 The average radius of the Earth is 6371 km L = 6371 * pi * 27.88 / 180 = 3100.115 km Approx. 3100 km
Saturday, March 3, 2012 at 8:31pm by Anonymous

Math
What you are doing here is comparing the circumference , the distance which is rolled bottom of cup: radius = 5 cm, so the circumference is 2πr = 10π top of cup: radius = 7 cm, so the circumference is 14π or appr 43.96 cm
Tuesday, January 22, 2013 at 10:28pm by Reiny

math
Find the area for the circle (use 3.14 for pi). Show your work. Round to the nearest tenth. the radius is 23 yd 22. Find the circumference of the circle (use 3.14 for pi). Show your work. Round to the nearest tenth.
Monday, February 10, 2014 at 12:46pm by melissa

math
I am supposed to find the area of a segment of a circle. The circle is cut with two radi with an angle of 90 degrees. Then where the radi touch the circle another line is drawn to connect them. The triangle and the small section between the triangle and the edge of the circle ...
Saturday, May 4, 2013 at 10:21pm by Ed

math
I am supposed to find the area of a segment of a circle. The circle is cut with two radi with an angle of 90 degrees. Then where the radi touch the circle another line is drawn to connect them. The triangle and the small section between the triangle and the edge of the circle ...
Sunday, May 5, 2013 at 7:57pm by Hannah

Geometry
Find the circumference of a circle whose diameter is 2xR=4.2 ft. Use Pi = 3.14, and round the result to the nearest tenth.
Thursday, September 10, 2009 at 9:49pm by Jenny

Algebra
wht is the area of a circle with a circumference of 25 meters? I have to use pi(3.14) and round to the nearest square meter.
Friday, March 30, 2012 at 11:51pm by Crystal

Geometry
Can I get help with some problem that its asking saying, "An inscribed regular triangle is removed from a circle with a circumference of 36 pie. Find the remaining area.
Thursday, May 22, 2008 at 10:29pm by Fabio

math
Whats the difference between an arc [of a circle]'s length and measure? And how do you find each of them? The "measure" of an arc is the angle that it subtends from the center of the circle. Call that angle A. The length of the arc is 2 pi R * [A/(2 pi)] = R*A, if A is in ...
Tuesday, March 20, 2007 at 8:46am by Emily

steev
can u help this the qustion is : A circle passes through the points (1,4)&(5,0) and its centre lies on the line x+y-3=0.Find (i) the equation of the circle and it parametric equations . (ii) the centre,diameter and area of the circle . (iii) the equation of the tangent at (1,4...
Wednesday, December 28, 2011 at 12:33am by math

math
can u help this the qustion is : A circle passes through the points (1,4)&(5,0) and its centre lies on the line x+y-3=0.Find (i) the equation of the circle and it parametric equations . (ii) the centre,diameter and area of the circle . (iii) the equation of the tangent at (1,4...
Wednesday, December 28, 2011 at 12:34am by steev

5th grade
Formula for area of a circle is πr^2 Formula for circumference is 2πr or πD where D is diameter which is double the radius. Now, try do the math...I will be glad to check your work.
Wednesday, March 17, 2010 at 4:47pm by LoveMaths

math
A circle has a circumference of 110.6 mm. Find its diameter to the nearest tenth. Choose the best answer from the options below: A 35.2 mm B 36.2 mm C 37.2 mm D 38.2 mm
Saturday, May 21, 2011 at 12:58pm by makeeda

math
just add up their circumferences. recall that circumference of a circle = π(diameter) so we have 3π + 3.2π + 2.8π + 3.5π + 2.9π = π(3+3.2+2.8+3.5+2.9) = .....
Monday, December 23, 2013 at 12:35pm by Reiny

Math
I'm having problems with this question, to tell you the truth I dont understand the problem. Andrew is considering building a clubhouse in the shape of a rectangle. His sketch of the clubhouse is.... (its a drawing of a rectangle with 8 ft at the top and 4 ft on the left end)...
Tuesday, April 21, 2009 at 6:35pm by Lemar

7th grade
if I have the circumference of a circle how do I find the diameter, and how do I find the radius
Tuesday, January 6, 2009 at 5:44pm by shaquahia

Algebra
If a circle has 81 square centimeters and a circumference of 16 centimeters then what is the radius?
Thursday, July 5, 2007 at 12:38pm by jasmine

Not so fast .....
Since each flower needs 1 square foot, the flowers planted along the circumference will not have a complete square foot. To illustrate, take a grid paper, and draw a circle with radius 7. we will need x^2 + y^2 = 49 you only have to look at 1/4 of the circle and look at the ...
Tuesday, March 18, 2014 at 11:11pm by Reiny

math/mathmate please answer or someone smart!!
Here is a very simple way to explain it. Consider any circle, the top of a coffee can or soup can will do. Hold a string along the diameter of the can. You will be able to fold that length around the can π times. that is, three times and "a bit" left over. that "bit left ...
Friday, June 3, 2011 at 9:37pm by Reiny

trigonometry
Gabe is spending two weeks on an archaeological dig. He finds a fragment of a circular plate that his leader thinks may be valuable. The arc length of the fragment is about 1/6 the circumference of the original complete plate and measures 1.65 inches. A similar plate found ...
Friday, May 28, 2010 at 2:03pm by candace

Math
True or false Some rational numbers are integers. The radius of a circle and its circumference. Direct or inverse f(x) 0.08x^3 + 0.6x + 2.8 Rational function, another polynomial function Quadratic function
Friday, November 22, 2013 at 1:39pm by KGK

Math
Some rational numbers are integers. True or false The radius of a circle and its circumference. Direct or inverse f(x) 0.08x^3 + 0.6x + 2.8 Rational function, another polynomial function Quadratic function.
Friday, November 22, 2013 at 3:20pm by KGK

Geometry
The area of a circle that has a circumference of 12 pi cm is ______ pi m squared?
Sunday, March 14, 2010 at 4:11pm by Gene

math
the circumference of the larger circle is indeed twice as long as that of the smaller one. but... the area of the larger circle is 4 times that of the area of the smaller. Proof: area of smaller = pi(4.5)^2 = 20.25pi area of larger = pi(9^2) = 81pi 20.25pi/(81pi) = 1/4
Wednesday, November 26, 2008 at 9:52pm by Reiny

Math
If the diameter of a wheel is 10 inches. What is the radius and how would I find its circumference. Thanks I do understand that the radius is twice the circumference.
Tuesday, March 15, 2011 at 7:06pm by Americal

Math: Geometry
The circumference is equal to (2)(pi)(r). Since you know the circumference is 16,and you know the value of pi and 2,solve for r.
Thursday, February 21, 2008 at 5:52pm by Joy

Math
4. Columbus had a hard time convincing anyone to undertake the expense of financing a voyage to an unknown place. Based on the information available from other sailors and partly on his own ideas, Columbus underestimated the circumference of the Earth by twenty-one percent. ...
Monday, March 31, 2014 at 4:36pm by Sue

OPTICS/PHYSICS-REALLY DO NOT UNDERSTAND THIS!
pi = 3.141592... It is the ratio of the circumference to the radius of a circle. It is usually represented by a Greek letter, but I cannot type it here.
Monday, August 27, 2012 at 6:43am by drwls

math
C = pi*2r = 3.14 * 16in = 50.3 In. L = (0.6rad/6.28rad) * 50.3in = 4.81 In. NOTE: The central angle measures 0.6 radians or approximately 0.1 of a circle. Therefore, the length of the arc is approximately 0.1 of the circumference.
Sunday, April 14, 2013 at 2:39pm by Henry

Math
The center of a circle is A(-3,3) an B(1,6) is in the circle. Find the area of the circle in terms of pi. a^2 + b^2 = c^2 radius is 5 and 25pi
Monday, January 23, 2012 at 9:48pm by J.R.

Math
you need to find the circumference as well... the way you find the circumference is by multiplying pie by the diameter
Monday, April 26, 2010 at 4:18pm by Sadie

Math
Cindy has two fourths of a circle and three tenths of a circle. What does she need to make a whole circle?
Monday, October 26, 2009 at 11:36pm by Juanita

8th grade math
The radius of circle M is 3 times the radius of circle P. If the area of circle P is abotu 27 sq. cm. the area of circle M is about what? (Use 3 as pie) i dont get it. is the scale ratio 3:1?
Monday, January 5, 2009 at 5:48pm by brianna

stats
the head circumferences of adult males have a bell-shaped distribution with the mean= 65cm and standard deviation =2cm. a. what is the head circumference such that only 2.5% of adult males have a smaller head circumference? b. what is the head circumference such that only 2.5...
Tuesday, October 9, 2012 at 11:05pm by jenny

math
The tangent from point T touches a circle at R.If the radius of the circle i 3cm and T is 5cm from the center of the circle.Calculate/TR/.
Saturday, September 17, 2011 at 3:37pm by Raha

Math
The area of a rectangle is shown below The area of the rectangle is 56 Which of the following are possible values for the length and width of the rectangle? A.length=6cm and width=9cm B.length=7cm and width=8cm C.length=14cm and width=14cm D.Length=28cm and width=28cm B? What ...
Wednesday, March 6, 2013 at 6:35pm by Jerald

mathematics
The circle x2-2x+y2-4y-4=0 lies on the cartesian plane,question 2.1.1 equation of new circle which is the rotation of original circle through 180 degree around the origin...2.1.2 find equation of another circle which is the translation (x;y)-(x-8;y-6) of the points of the ...
Thursday, March 21, 2013 at 4:46am by Jossie

Geometry
The shaded region is between IKD THere are to lnes opposite of each other. Then to parallel lines through those lines. Thers is a circle in the middle with a circumference of 20 pi. THen there is a triangle that connected to the outer lines to the right. the measure of the ...
Sunday, March 6, 2011 at 4:55pm by Gemma

Algebra
Hmmm. Did you wonder why the radius of the circle was bigger than the circumference? That can't be, at least here in Texas. C=2Pi*r r=C/2PI
Saturday, June 6, 2009 at 10:49am by bobpursley

geometry
what is the area of a circle with a circumference of 22 pi in.? expressed in pi in. squared? and what are the steps to arrive at the solution?
Tuesday, April 5, 2011 at 6:23pm by Rachel

Geometry
In my book there's a picture of an equalderal triangle. This is given information. Inside the triangle all three altitudes have been drawn to find the center point of gravity. The incircle is drawn. The circumcircle is drawn. Given that the radius of the incricle is 1, what is...
Thursday, May 15, 2008 at 5:07pm by Geometry

Math
if you consider the shape of the letter C as a half circle, the perimeter (circumference ) would be, C = pi * d, therefore C = 1/2 pi * d I really have no idea if this is what you need. thought I would take a stab since no one has answered. I am not a tutor
Tuesday, January 11, 2011 at 7:26pm by helper

Physics
A particle of mass m1 is tide to a string and describes a circumference on a horizontal plane. The string (of negligible mass)passes through a hole that is in the center of the plane and goes down vertically. At the lower end is tied another particle of m2. If the first ...
Sunday, November 11, 2012 at 6:45am by Leslie

maths
Γ 1 is a circle with center O 1 and radius R 1 , Γ 2 is a circle with center O 2 and radius R 2 , and R 2 <R 1 . Γ 2 has O 1 on its circumference. O 1 O 2 intersect Γ 2 again at A . Circles Γ 1 and Γ 2 intersect at points B an
Tuesday, June 18, 2013 at 11:30pm by best

Math
A quarter of a circle plus and eighth of a circle is what percent of a circle
Monday, November 16, 2009 at 6:11pm by Logan

algebra
Hi, Lucy, this is Matthew's mom, if you put the three corners together you would get 1/2 a circle or circumference. I hope this helps you.
Tuesday, February 14, 2012 at 6:38pm by Matthew

maths
since 2 hours is 1/6 of the complete circle, the hand goes 1/6 the circumference: 2pi*18 / 6 = 6pi = 18.85cm
Thursday, January 3, 2013 at 11:59am by Steve

Math
I have a question my brother asked me but I need a math expert. You have two interlocking circles and the radius of circle B goes through the center of circle A and of course the radius of circle A goes through the center of circle B. The radius of each circle is 30 feet. Now...
Tuesday, June 25, 2013 at 1:03am by DrBob222

math
the inner circumference of a ring is 1.2pi cm. the outer circumference of the ring is 2pi cm. find the area of the region bounded by the outer and inner circumference.
Sunday, January 8, 2012 at 12:34am by Randy

Math
4. Columbus had a hard time convincing anyone to undertake the expense of financing a voyage to an unknown place. Based on the information available from other sailors and partly on his own ideas, Columbus underestimated the circumference of the Earth by twenty-one percent. ...
Tuesday, April 1, 2014 at 11:33am by Sue

math
That probably means that the radius is 3.75. The circumference of a circle is found by multiplying pi times the diameter. Since the radius is only half of the diameter, we need to use twice the radius or 7.5 feet C = 3.14 * 7.5 C = ?
Wednesday, September 16, 2009 at 5:59pm by Ms. Sue

6th grade math
There are three crowns in the royal cabinet: One for the King, One for the Queen, and one for the Princess. The king's circumference was 21.98 in, the Queen's circumference was 43.96 cm and the Princess' circumference as 392.5 mm. What are the Diameters's for all three crowns?
Wednesday, April 27, 2011 at 10:14pm by Ann

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