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Was is the equation for the radius given diameter?


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Answered 2009-01-18 05:39:26

The radius of a circle is equal to 1/2 of it's diameter. radius is one half of the diameter. Therefore ; r = (1/2) D

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multiple the diameter by 2 to get the radius, then use your equation and go from there



The radius is half the diameter.


the equation for the circumference of a circle is 2*radius*pi, or since the radius is half of the diameter 2*radius=diameter, we can simplify the equation to the circumference of a circle=diameter*pi


I guess you mean:"How do you find the radius if you are given the diameter?"You take the diameter and divide it by 2.


you have multiplythe radius by 2 to get the diameter




The radius is one half of the diameter. If the diameter is 20, the diameter is 10.


radius is half diameter...so divide diameter by 2!!!


The diameter by definition because a diameter of a given object is twice its radius.


The diameter of the semicircle will be twice the radius.


Diameter =2R(whare R-Radius of the circle)


The diameter is twice the radius - so, using your example, the diameter would be 6.


The radius of a circle = the diameter of the circle divided by 2


if you are given the circle's "height" then that is the diameter. the diameter is twice the length of the radius, so divide the height by two and you will get the radius.


you cant: pi is the same for any circle - 3.1415... the diamter or the radius has to be given diameter divided by two equals the radius the radius times two equals the diameter


The radius of a circle is half of the diameter! So, if the diameter was four inches, the radius would be two inches!



The radius of a circle is equal to half of it's diameter. If you want to figure out the radius from a given diameter, simply divide the diameter by two:Radius = Diameter / 2Radius = 61 / 2Radius = 30.5 yd


Circumference = Diameter multiplied by Pi Diameter = Circumference divided by pi Radius = Diameter divided by 2.


If you are given the radius of the circle, you can use the formula: diameter = 2*radius If you are given the circumference of the circle, you can use the formula: diameter = circumference/pi


circumference=pi * diameter radius= 1/2 diameter


Diameter = circumference/pi Radius = circumference/2*pi




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