what is the circumfrance of a circle?
147303
2 times pi times the radius\nor\npi times the diameter\n\npi = 3.14\n\nThe first person to answer gave you the formula for the area, not circumference.
1003907
well nice question\n\nThe largest circle would be one that had its centre point in the centre of a white square and it runs through the black squares around it. It starts through the corner of one black square and goes through the square and continues through to the next black square joined by the corners.  \n\nThe diameter of the circle would be  d = SQRT(5^2+5^2)\n         Where SQRT means square root of (   )\n                and ' ^ ' means to the power of.\nd= 7.07 cm\n\nTherefore the circumference =(pi)*(d)\n\nCirc. = 22.21\nHope it helps
224253
You know that the area of a circle is given by:\nA = (pi)(r²)\n\nYou also know that the radius is half the diameter, so\nr = d/2\n\nYou may substitute this to the area formula:\nA = pi * (d/2)²\nA = pi * d²/4\nA = (pi)(d²)/4\n\n^_^
412281
circular segment\n\nhttp://en.wikipedia.org/wiki/Circular_segment
1055461
45/360....THATS THE RATIO CZ THE WOLE CIRCLE SUBYENDS A 360 ANGLE WHILE THE ARC SUBTENDS A 45 ANGLE SO THE RATIO OF THE ARC TO CIRCUMFERENCE IS 45/360
312528
The radius of a circle is the distance from the center of the circle to the edge of the circle.
1173297
Well, the circumscribed cylinder will have a radius equal to that of the sphere, and a height equal to the sphere's diameter (which is twice its radius).\n\nS.A. of a sphere = 4*pi*r^2\n\nS.A. of the lateral part of a cylinder = (perimeter of endcap)*(height of cyl.)\n= (2*pi*r)*(diam. of sphere)\n= (2*pi*r)*(2*r)\n= 4*pi*r^2\n\nQ.E.D. :)\n\nHope that helps.
601593
Circumference is the distance around a circle.  2 times pi ( which is about 3.14) times the radius (the distance from the center of the cirle to any side).  In formula form it looks like this C = 2*Pi*r.\n\nThe formula for area of a circle is A = Pi*r^2 ( also known as r squared)
676437
Almost a coicle!\nEach side would subtend an anhle of slightly more than 1.5degrees so it is very close to a circle. I don't think it has any official name.
275576
pi is the circumference of a circle divided by its diameter.  It has been estimated over the years by many mathmeticians but now we have got it down to a lot of decimal places.  try http://en.wikipedia.org/wiki/Pi
680200
Assuming this means a circle...\n\ndefn/:\n\nc=circurmfernce\nA=area\nr=radius\nd=diameter\npi=pi (~3.1415926...)\nd=2*r\n\nC=2*pi*r=d*pi\nA=pi*(r^2)...(area is pi*r squared...pie are squared-no there not their round).\nA=pi*(d^2)/4.\n\njust plug and chug...\n\nC=10*pi.\nA=25*pi.\n\nanswer:\n\nit's that simple
385118
the circumference divided by 2 x PI
392733
Divide the circumference of a circle its diameter.
269071
Okay, what you want to do is find the circumference of the circle. That's 2(pi)r. That's 37.69911184... . Next find 32 as a decimal of this number - 32/(true cicumference). The fractional decimal is 0.8488263632... . Finally take this percentage and multiply it by 360 and you get 305.5774907... degrees or 305 degrees (accurate to 3 s.f.)
277090
Essentially, circumference is used to describe:\n\n1. The distance around a circle (picture a circle made up of a piece of string wrapped around, the circumference is the length of that string)\n\nand\n\n2. The distance around a sphere (a 3d version of a circle)\n\nCircumference is calculated using the formulae\nc = pi x d or c = pi x 2r where c = circumference, d = the diameter of the sphere or circle, r is the radius, and pi is approx. 3.14
1175861
Area of Semicircle = (PI * R * R)/2\n\nAns. = 2.262 sq. cm
203653
http://en.wikipedia.org/wiki/Squaring_the_circle\n\nAll you need is there...