Diameter = 2*Radius
pie multiplied by the radius.
The radius is half the diameter. So, if the diameter is 8, then the radius is 4.
radius *2 = diameter so then plug the radius in... 4*2=8 8 is the diameter of the figure.
Radius = 4 so diameter is 8. 2xR = D Circumference formula: C = pi x diameter So 25.133 = 3.14 x 8
circumference formula is pi(diameter) diameter is 2(radius) radis=4; diameter=2(4)=8 pi(8)=circumference of the circle...this is the EXACT answer plug it into a calculator and you will get 25.1327412287 your welcome ;)
Diameter = 2 times radius = 8
The diameter would be 8cm, because the diameter is always double the radius. That's why the formula 2'Pi'r is also known as 'Pi'd.
The diameter of a circle can be found without the circumference using the formula d = 2r. This formula requires that you know the radius of the circle which is half of the diameter. To calculate the diameter you need to multiply the radius by 2. For example if the radius of the circle is 4 then the diameter would be 8 (4 x 2 = 8).You can also find the diameter of a circle if you know the circumference. To do this use the formula c = d. By rearranging the equation you can calculate the diameter as d = c/. For example if the circumference of the circle is 12.5 the diameter would be 4 (12.5/ = 4).
Radius = 1/2*Diameter Thus, 1/2*8 = 4 Flowerpot has a radius of 4.
Radius = 1/2 diameter. So, if the diameter is 8", then radius of the circle is 4".
Radius = Diameter / 2 In this case, diameter = 8 cm so radius = 4 cm
let d = diameter let r = radius r = d ÷ 2 r = 8 cm ÷ 2 = 4 cm