it would be pi * radius squared
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 the cylinder would be 0.64cm ! The radius is half the diameter - length has nothing to do with the question !
Divide the circumference by 2PI to find the radius. ( C = 2PI*Radius)
you double the radius to find the diameter.
In the forearm.
Well to find the radius of that, you would divide 8 by pi- so about 2.55. that would be the diameter so the radius would be about 1.27
Since the area of a circle is (Pi)times(Radius squared) then you would reverse the process to find the radius, and hence, the diameter. Divide the area by Pi (3.14159...) and you would have the radius squared. Take the square root of that and you have the radius. To get the diameter, multiply the radius by 2.
The radius is half diameter, so in your case the radius would be 1.5 inches.
it would be pi * radius squared
The radius of a circle is half of the diameter! So, if the diameter was four inches, the radius would be two inches!
A circle with the radius of 21cm would have an area of approximately 1384.74 cm. You would find this by using the equation of pi*(radius^2) = pi*(21^2).
Oh, dude, finding the radius of a pyramid is like finding a unicorn at a petting zoo. First, you gotta locate the center of the base, then draw a line from there to the apex. The length of that line is the radius. It's like finding the pot of gold at the end of the rainbow, except with math.
If the diameter is what you are talking about that is 6 cm, you must divide that number by two to find the radius because the radius is half a diameter. The radius of a circle with a diameter of 6 cm. would be 3 cm.
Angular speed is calculated by dividing the linear speed by the radius. If the radius is unknown, you would not be able to directly find the angular speed without more information about the motion.
A square does not have a radius. A square, with sides of length x units, can have an inscribed circle. Such a circle would have a radius of x/2 units. Or the square could have a circumscribing circle. This would have a radius of x/sqrt(2) units.
The radius of the cylinder would be 0.64cm ! The radius is half the diameter - length has nothing to do with the question !