Thursday
July 31, 2014

# Search: math/ CIRCUMFERENCE of a circle

Number of results: 93,109

I have a review question that says: The formula for the circumference of a circle is C = pi x d, where d represents the circle's diameter. Which statementis correct? Would it be D? Wasn't sure if a diameter could have a decimal or fraction. A. the formula only works if d is 1 ...
March 27, 2012 by Brandi

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

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/.
September 17, 2011 by Raha

geometry
IF d equal 18 cm what is the circumference and what is the circumference to the second power.
June 18, 2010 by glo

science
If the head circumference is 22.75in what is the uncertainty in circumference?
March 11, 2011 by karrimah

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?
January 5, 2009 by brianna

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
January 23, 2012 by J.R.

math
a circular plate has radius 15cm. every dimension is multiplied by 4 to create a larger, similar plate. how is the ratio of the circumferences related to the ratio of the corresponding dimesions? what is the ratio to the circumferences?(hint: think of circumference as ...
January 7, 2010 by miah

Hi. This is my question: An art student wants to make a string collage by connecting six equally spaced points on the circumference of a circle to its center with string. What would be the radian measure of the angle between two adjacent pieces of string, in simplest form? ...
April 20, 2009 by Ashfia

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...
June 25, 2013 by DrBob222

Precalculus
The figure shows part of a curve traced by a point on the circumference of a circle of radius 4 that rotates, without slipping, around a fixed circle of radius 2. The rotating circle starts with angle t = 0 radians and the point P (x, y) at (10, 0). In this problem you will ...
January 20, 2012 by Anon

math
mae has a oval racetrack. 2 curves, each is 1/2 of the circle and each on a radius of 21". 2 straight-aways connect the circle and are 46" long. what is the total distance around the circle?

math
mae has a oval racetrack. 2 curves, each is 1/2 of the circle and each on a radius of 21". 2 straight-aways connect the circle and are 46" long. what is the total distance around the circle?

math
Brilli the ant placed the numbers 1,2,,n in order clockwise around a circle. She can create an infinite sequence A={aj}∞j=0 of integers by letting a0=k∈{1,2,,n} and constructing ai+1 from ai by taking the integer that is ai positions clockwise in the circle from ...
July 16, 2013 by Ron

Physics
Twelve identical point charges are equally spaced around the circumference of a circle of radius 'R'. The circle is centered at the origin. One of the twelve charges, which happens to be on the positive axis, is now moved to the center of the circle. Part A Find the magnitude ...
February 3, 2011 by Crystal

Math
Hat sizes are determined by measuring the circumference of the head in either inches or centimeters? use ratio and proportions to complete the following table Hat size =7 Head circumference inches = 22 and Centimeters =56 and If hat size was 6 3/4 Head circumference in inches ...
July 30, 2010 by Delores

Math
Hat sizes are determined by measuring the circumference of the head in either inches or centimeters? use ratio and proportions to complete the following table Hat size =7 Head circumference inches = 22 and Centimeters =56 and If hat size was 6 3/4 Head circumference in inches ...
July 30, 2010 by Delores

Geometry
What is the circumference of the circle if the radius is: 5x-My answer was 57(x)pi. What is the radius if the circumference is: 30x(pi)-My answer was 2x. (x + y)pi -My answer (x+y)/7. What is the length of the arc if: radius=3 degree of measurement of arc=6- My answer was pi/9...
June 14, 2010 by Temperance

Math (help steve)
Brilli the ant placed the numbers 1,2,,n in order clockwise around a circle. She can create an infinite sequence A={aj}∞j=0 of integers by letting a0=k∈{1,2,,n} and constructing ai+1 from ai by taking the integer that is ai positions clockwise in the circle from ...
July 16, 2013 by Danny

physics
A block of mass m = 4.30 kg is released from rest from point circle a and slides on the frictionless track shown in the figure below. (Assume ha = 5.20 m.) B=3.20 c=2.00 (a) Determine the block's speed at points circle b and circle c. point circle b Y point circle c (b) ...
February 23, 2012 by Darcie

You are given two different circles. The diameter of the first circle is the radius of the second circle. What is the ratio of the area of the larger circle to the area of the smaller circle. Your answer should be in the form of a simplified fraction. I have no idea where to ...

Math
Find the area of a circle whose circumference measures 100 cm. Area (to the nearest square centimeter) = cm2 I plugged in everything C = 2 r C=2x3.14x100= 628 <<< The computer said it was WRONG ! Then, I tried C= 2X3.14X50= 314 !!! If I am wrong can you EXPLAIN to me ...
June 28, 2013 by sarah

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
June 18, 2013 by best

maths
please can some one help me..? Part a - O is the centre of the circle, and P , Q are points on the circumference of the circle, with the angle POQ being a right angle. The radius of the circle is 3 cm. Choose the option that is the area of the smaller sector POQ, correct to 3 ...
September 11, 2007 by kelly

Math
A quarter of a circle plus and eighth of a circle is what percent of a circle
November 16, 2009 by Logan

geometry
For "circle"(O,r) , AP is the tangent at "A belongs to circle", from an exterior point P. Now, OP "intersection" circle = {B}. If BP = 1.6 = AB/5 , Then find diameter of the circle.
January 21, 2010 by parnas

physics
A patialy moves along half the circumference of a circle of 1 meter radius. Calculate the work done if the force at any point inclined at 60o to the tangent at that point has 5 New tones magnitude
July 10, 2012 by sunil

Math
Let A, C be the endpoints of the diameter of a circle and B an arbitrary point on the circle. Using the slopes of secant lines show that \ABC is a right angle. You can assume the circle is centered at the origin.
October 2, 2012 by Kole

Math
The point A (-7, 5) is reflected over the line x = -5, and then is reflected over the line x = 2. What are the coordinates of A'? (7, 19) (10, 5) (7, 5) (10, 19) Question #45 MultipleChoice The vertices of an isosceles triangle are A(3, 6), B(7, 2), and C(4, 3). What is the ...
January 20, 2012 by Callie

astronomy
if the earths orbit is 1.5x10^8km, determine how fast earth moves along its orbit assume there are 365 days in a year. remember the circumference of a circle is equal to 2pi where r is the radius.
January 16, 2013 by kristy

Circles.
Ok I'm trying to find the radius of a circle with the given measurement. 4/5C=17 C stands for Circumference. Solve for C (multiply both sides by 5/4) Then, solve for radius R= C/2PI
July 19, 2007 by Scott

geometry
1. Find the area of the parallelogram. (1 point) 3,302 ft2 3,484 ft2 3,752 ft2 4,020 ft2 2. Find the area of the triangle. (1 point) 21.84 cm2 21.2 cm2 10.92 cm2 10.6 cm2 3. Jorge plans to paint a bedroom wall that is shaped like a trapezoid. The bottom edge of the wall is 22....

Pre-Calc
Describe the conditions necessary for the two circles, where circle a has a larger radius than circle b, to have no points of intersection, while each circle is entirely in the exterior of the other circle.
November 17, 2009 by Anonymous

Geometry
find the circumference of the figure, Give both the exact value and an approximation to the nearest hundredth. Circle 6.6km I am just learning this and a teacher is using inches but the textbook has metrics and I never learned the metric system Please Help!
March 28, 2011 by Jeannie

Math
Mr. Anderson has a whirling sprinkler for watering his lawn. The sprinkler waters a circle whose length from the sprinkler to the edge of what is 12 meters. Find the area of the lawn that he can sprinkle at one time. I know it says find the area but my teacher said something ...
February 24, 2014 by Anthony

Matheematics: Circles And Circumference
you have two coins with a total circumference of 116.18 millimeters. How much money do you have? Please Help
January 29, 2012 by Ayana Reid

geometry
balloon has a circumference of 23 cm. Use the circumference to approximate the surface area of the balloon to the nearest square centimeter.
May 9, 2014 by Anonymous

The distance from the pole in the center of the tetherball circle to the painted circle was about six feet. What was the approximate radius of the tetherball circle? Thank you. A. 12 ft B. 4 yd C. 3 ft D. 2 yd
December 14, 2008 by Mary

Math
Rosario noticed that the distance from the pole in the center of the tetherball circle to the painted circle was about six feet.What was the approximate radius of the tetherball circle?
November 11, 2010 by Daijiana

Math
Answer check please: Consider the circle (x-3)^2 + (y+1)^2 = 169. The point (15,4) is on the circle. Find an equation for the line that is tangent to the circle at this point. I got y= 5/12x-9/4.
August 26, 2012 by KC

Math ?
I started a new math class today and I'm stuck on a problem from my worksheet. I need help with these questions. If the measure of an exterior angle drawn at vertex M of triangle LMN is x, then mangleL + mangleN is what? What is the area of a circle with the circumference of ...
August 21, 2006 by Rebecca

Math
If a dart is thrown at a square target with a circle inscribed in it such that each side of the square is tangent to the circle, what is the approximate probability that the ball will hit inside the circle?
August 22, 2011 by Amy

math
two circles intersect at point T.if the small circle has a raduis of 4 and C is the center of the larger circle,then the diameter of the larger circle must be 1]4 2] 8 3] 12 4]16 5] not enough information is given
November 15, 2012 by pierre

Updated Math Question
The radius of circle A is 9 times greater than the radius of circle B. Which of the following statements is true? A.The area of circle B is 9 times greater than the area of circle A. B.The area of circle A is 9 times greater than the area of circle B C.The area of circle B is...
July 18, 2012 by Kim

Geometry
1. Find the diameter of a circle with a circumference of 50 mm. Round your answer to the nearest tenth. a) 16.0 mm b) 26.4 mm c) 8.4 mm d) 33.5 mm 2. Find the area of the circle with the given radius or diameter. Round your answer to the nearest tenth. Diameter = 42.0 mm a) ...
February 26, 2013 by Sandy

math
a triangle with side lengths 26, 28, and 30 is constructed so that the longest and shortest sides are tangent to a circle. the third side passes throught the center of the circle. compute the radius of the circle
January 10, 2011 by LULU

math...2 word problems
Two questions: (1) In a class every boy is friends with exactly 3 girls. Every girl is friends with exactly 2 boys. There are only 19 desks (each holding at most two students), and 31 of the students in the class study French. How many students are there? (2) A smaller circle ...
June 17, 2009 by M.A.

math
Finding rate in math.... Rate=distance/time So if the distance is a circumference which in this case is 10 pie, and the time is 10 seconds. You multiply 10 and the circumference but is the 10 seconds TEN or 1/6
December 6, 2011 by HOROSH

math
Function M described by M(x)= 3x+16 can be used to predict the circumference of the waist of a male in x inches who is obese . Predict the circumference of a males waist whose inches are 49 would this be 3(49)+16=163 I hope I did this right
September 2, 2011 by katie

math
-a circle with center at the point O(0,0) also has the point P(-2,3) on it. The equation of this circle is? and a second question: -A circle has a center of square root 5. The equation of this circle is? Please help me.
October 9, 2008 by Garrick

physics
A roller-coaster car of mass 1.80 103 kg is initially at the top of a rise at point circle a. It then moves 40.8 m at an angle of 50.0° below the horizontal to a lower point circle b. (a) Find both the potential energy of the system when the car is at points circle a and ...
March 4, 2014 by sarah

math
two fourths of a circle plus two tenths of a circle is what decimal part of a whole circle?
September 20, 2012 by Carol

Math
The triangle below has a height of 12 feet and a base of 9 feet. What is the area of the triangle? A.108 B.54 C.21 D.30 B? If the area of a square is 81 square meters which formula would you use to calculate the perimeter of the square? A.p=lxw B.p=s+s C.p=4(s) D.Not here C? ...
March 6, 2013 by Jerald

math
how do u compare a circle and an image of the circle? I'm not quite sure what you are asking. If you have a circle, it is typically represented by its image. If possible, please repost with a more detailed question. I hope this helps a little. Thanks for asking. yes
October 26, 2006 by chemiii

MATH!!!!
A triangle with side lengths 26, 28, and 30 is constructed so that the longest and shortest sides are tangent to a circle. the third side passes through the center of the circle. compute the radius of the circle. I DONT KNOW HOW TO DO THIS AT ALL....
January 28, 2011 by Diana

Math
The points (4, 5) and ( 4, 1) are endpoints of a diameter of a circle. (a) Find the center of the circle. (b) Find the length of the radius of the circle. (Note that this is a distance.) Give the exact answer. Show work. (c) State the equation of the circle (in standard form...
June 24, 2009 by Kate

trig
an art student wants to make a string collage by connecting six equally spaced points on the circumference of a circle to its center with sting. What would be the radian measure of the angle between two adjacent pieces of string, in simplest form?
February 24, 2011 by ganash

maths
1) Circle centre (7,-2) passes through (-2,10). Calculate radius and find equation of circle. 2) AB is diameter of circle A(9,5) B(-1,-7). Find equation of circle mid point. I know i have to use the eqn (x1+x2)/2 and (y1+y2)/2 3) Find the equation of circle with centre (-8,5...
February 24, 2008 by Anonymous

192
a pizza has a radius of 9inches. the pizza is divided into sections. one of the section has a central angle with a measure of 60 degrees wat is da area of this section of pizza? what happens to the area of the sector if u double the central angel? how much greater in feet is ...
April 11, 2011 by kelvin

geometry
m<S=30, m(arc)RS=84,and RU is tangent to the circle at R find m<U. It's a circle with a triangle inscribed, only the s and r lie on the circle and u extends past circle. can someone help i do not know or understand these problems answers 27 12 54 24 m(arcDE=123 and m(...
May 14, 2012 by lilman

geometry
In the diagram, circle A is tangent to circle C, and segment BE is tangent to circle A. The radius of circle A is 11 meters and the radius of circle C is 8 meters. Find the area of triangle ABE to the nearest square meter.
April 4, 2013 by joe

Maths
2014 numbers are placed along the circumference of a circle. When any five successive numbers are added, the total is always 40. What are these 2014 numbers? Please explain how you figured this out. Working is really appreciated.
June 7, 2014 by Tanvi

Math
I am supposed to find the area of the shaded section of a circle. The circle is cut with two radi with an angle of 60 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 ...
December 16, 2009 by Punkie

Computer Science (Basics)
public class Circumference { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub ; final double PI = 3.14159; int radius = 10; double area = PI * radius *radius; double circum = 2 * PI * radius; System.out.println("The area of a ...
September 14, 2008 by Mike

Geomatric series
A fractal is created: A circle is drawn with radius 8 cm. Another circle is drawn with half the radius of the previous circle. The new circle is tangent to the previous circle. Suppose this pattern continues through five steps. What is the sum of the areas of the circles? ...
November 25, 2012 by HanuMath25/11

Circle geometry
Please help Explain how I figure this out. A circle has diameter 70cm. A chord in the circle is 50cm long. How far is the chord from the center of the circle? I have been stuck on this for days. I appreciate any help. Thank you!!
April 10, 2014 by Cherie

math
The dimensions of circle B are three times the dimensions of circle A. The area of circle A is 49 cm2. What is the area of circle B?
March 13, 2013 by tatyana

math trigonometry
There is a small circle and a big circle. A small circle has a radius of 1.5. What is the area of the big circle?
March 26, 2013 by joshua joyo

math
We have a circle that has 270 degrees listed outside the circle at the top left. Inside the circle at the bottom right side is a an angle inside the circle with a P. Find the measure of Angle P. Would this be that we take 360-270 to get the measure of Angle P?
December 7, 2010 by m

geometry maths
a circle of radius 1 is inscribed in a square. A smaller circle is tangent to two sides of the square and the first circle. Determine the radius of smaller circle and larger circle

Math
Hi guys, In the question "It is given that P (0, 3), Q(7, 5), R(9, -2) and S are vertices of a square. A circle A passes through the points P, Q, R and S. Find the equation of this circle. Hence or otherwise find the equation of circle B which is the image of A under the ...
October 17, 2008 by Joshua

area of circle
The radius of a circle is 8ft. I have 60ft of tile. Is this enough to cover circle. Do you mean you have 60 SQUARE feet of tile? The circle's area is much more than that. How would you find he angle to a circle if half of it is 12 in. ??? and how owuld you find the area of a ...
March 5, 2007 by jodie

math (pre clac)
so its this picture of a rectangle inscribed in a circle. the circle has a radius of 2. the vertexes of the circle are present in every quadrant, but you cant tell exactly whgat point they represent. point Q (x,y) is the vertex of the rectangle in Quadrant I and is on the ...
April 25, 2008 by Alexis

math
From an exteror point P that is h units form a circle of radius r, a tangent line is drawn to the circle. Let d denote the distance from the point P to the point of tangency T. Express d as a function of h.(HINT: if C is the center of the circle, the PT is perpendicular to CT)
January 30, 2012 by brittany

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...
December 28, 2011 by math

algebra
Write and solve an inequality to find the approximate circumference of Earth using the following information - the 4 million miles of public roads in the U.S. would: Reach to the moon and back more than eight times, circle the globe more than 157 times
September 29, 2010 by Ashley

physics help
a particle moves uniformly around the circumference of a circle whose radius is 8 cm with a period of pi/20 s. the angular velocity w of the particle is a. 2.5 rad/s b. 3.2 X 10^2 rad/s c. 40 rad/s d. 7.9 rad/s e. 96 rad/s please explain thanks!
December 14, 2008 by rory

math
the main trunk of a tree is in the shape of a cylinder. The distance around its cross section is 47.1cm and its height is 0.7m. What is the radius of the cross section? I know i have the height and circumference, would i divide the circumference by 4 to get the radius? how ...
November 10, 2008 by sidlord

math b
how to find if line rp is tangent to circle 0 at p, and the circle bisects 0r at point m. if tangent segment rp has a length of a radius of circle o how do i find the radcal form and the nearsest hundreth
November 16, 2008 by jeannine

maths
1 .Find formula the perimeter and area of a semicircle ? 2.Find formula the area of a circle whose circumference ?
March 23, 2008 by MTH

math
Ellen placed a string from one point on a circle, through the center, and to a point on the other side of the circle.Approximately how many times can this length of string fit around the outside of the circle?
March 8, 2012 by gary

MATHS
two circles c1 and c2 meet at the points A and B. CD is a common tangent to these circles where C and D lie on the circumference of C1 and C2 respectively. CA is the tangent to c2 at A. When produced DB meets the circumference of C1 at p. Prove that PC is parallel to AD
August 18, 2011 by JJ

math
What makes a circle different from a cylinder? A circle is one-dimensional. You can draw a circle on a piece of paper. A cylinder is three-dimensional. It has volume.
August 1, 2005 by eleqsander

geometry
The diameter of Earth is 12,742 kilometers; the diameter of the moon is 3476 kilometers. a. If you flew around Earth by following the equator at a height of 10 kilometers, how many trips around the Moon could you take in the same amount of time, at the same height from the ...
March 4, 2012 by kim

Geometry
Find the area of the following circle. ( = 3.14; round answer to the nearest whole number). Circumference = 120 cm. (Hint: Find r from C = 2r (round r to tenths); then find area).
January 16, 2011 by Ivan

physics
A circle with a radius of R is inscribed in a square. On the corner of the square are point charges of +q, +q, -q, and +q. On the circle are charges of +2q, +2q, -q, and +q. (See sketch.) If q = 4.8 micro-coulombs, and the total potential at the center of the circle due to all...
February 10, 2012 by Mandaleigh

Math
The area of a circle is found with the formula A= 3.14r2 where 3.14 represents 3.14. If a tile artist is placing tiles in a circular mosaic pattern and the area of the circle is 658 square feet what is the approximate radius of the circle in feet?
October 11, 2013 by Franchesca

Physics
Calculate the work done by planet X on its moon. Planet X applies a force of 5.6 x 10^10 N on its moon and the moon is 4.0 x 10^8 km away from the planet and it continues to circle the planet in a circular orbit of circumference of 2.5 x 10^9 m.
March 26, 2008 by Marty

math-geometry
The sum of the radii of two concentric circles is 40. A chord with length 36 of the larger circle is trisected by the smaller circle. The area of the smaller circle is k*pi. Find the value of k. Express your answer as an exact decimal. Please show work. Thank you very much.
January 17, 2008 by paragon

Algebra
Use the formula C=2pi to find the radius, r, for a circle with a circumference of 160 centimeters. Round your answer to the nearest hundredth. a) 50.96 cm b) 28.08 cm c) 25.48 cm d) 80.00 cm When I tried to solve this problem, I never got any of these answers; I got 251.32, ...
June 6, 2009 by Cassie

math
A shaded circle just fits inside a 2m x 3m rectangle. What is the radius in metres, of the largest circle that will also fit inside the rectangle but will not intersect the shaded circle? ------------------------------------------ I have a diagram with me, but I don't think it...
January 11, 2011 by dan

Geometry
A dartboard consists of five concentric circles. The radius of the smallest circle is about 1 inch. The radius of the second circle is about 3 inches longer. The radius of the third circle is about 1 inch longer than the previous circle. The radius of the fourth circle is ...
May 16, 2012 by Sholanda

Math
Nicole drew a circle on the chalkboard that had a radius of 15 cm. Which is closest to the circumference in centimeters of the circle she drew on the board? A.30cm B.45cm C.24cm D.90cm D Which statement is not supported by the information in the graph? 6th graders 188 boys 192...
June 4, 2013 by Jerald

geometry
a circle of radius 1 is inscribed in a square. A smaller circle is tangent to two sides of the square and the first circle. Determine the circumradius and inradius of the smaller circle

math
the area of circle B is 36 times greater than the area of circle A. The radius of circle B is 30. what is the radius of circle A
August 26, 2012 by janell

Math
Please help with this problem! Planet Pemdas is a perfect sphere that does not rotate. If a rocket flies in a path following the circumference of Pemdas, and maintains a constant altitude of 25,000 feet above the surface for one orbit, how many more feet than the planet's ...
April 7, 2009 by Caroline

PHYSICS
A circular loop of flexible iron wire has an initial circumference of 168cm , but its circumference is decreasing at a constant rate of 15.0cm/s due to a tangential pull on the wire. The loop is in a constant uniform magnetic field of magnitude 1.00T , which is oriented ...
September 8, 2012 by sarah

physics
An object, after being released from its circular path, travels the distance OA in the same time it would have moved from O to P on the circle. The speed of the object on and off the circle remains constant at the same value. Suppose that the radius of the circle in Figure 5.4...
February 21, 2007 by Mary

physics EM
Shrinking Loop. A circular loop of flexible iron wire has an initial circumference of 167 cm, but its circumference is decreasing at a constant rate of 10.0 cm/s due to a tangential pull on the wire. The loop is in a constant uniform magnetic field of magnitude 0.600 T, which ...
April 8, 2008 by Spencer

GEOMETRY INSCRIBED ANGLES MULTIPLE CHOICE QUESTION
segment BC is tangent to circle A at B and to circle D at C. (Not drawn to scale) AB=10 BC=25 and DC=3. Find AD to the nearest tenth. Hint: Draw an auxiliary line from D to segment BA. {There are two circles, the larger one has point A in the center and a dotted line going up ...
May 15, 2012 by aYaMe ;)

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