how to calculate radius or diameter?
122619
Just remember to divide the diameter by two to get the radius. If you were asked to find the radius instead of the diameter, you would simply divide 7 feet by 2 because the radius is one-half the measure of the diameter. The radius of the circle is 3.5 feet. You can also use the circumference and radius equation.
955129
Use “D = R x 2”, in which "D" equals diameter and "R" equals radius, to solve for the diameter using the numbers you got earlier. Then use “C = pi x D”, in which "C" equals circumference, to solve for the circumference.
15532
The circumference of a circle is equal to pi times the diameter. The diameter is two times the radius, so the equation for the circumference of a circle using the radius is two times pi times the radius.
72517
The circumference = π x the diameter of the circle (Pi multiplied by the diameter of the circle). Simply divide the circumference by π and you will have the length of the diameter. The diameter is just the radius times two, so divide the diameter by two and you will have the radius of the circle!
535467
Well, to get the radius from the circumference of a circle, you would divide it by 2 pi. pi and pi cancel out and we have... If we were to find diameter from a circumference, we only need to divide by pi since 2*r = diameter. hope this helps!
927986
Take half the diameter, square it, multiply it by pi (3.1416) - that is the area of the end. Take the diameter, multiply it by pi, multiply it by the cylinder length - that is the area of the curved surface. Add the two areas together and you have the total surface area of the cylinder with one end open.
47346
how do you find the radius of a circle if you only know the area of the circle. Do you somehow reverse the Pi formula. and hence if you know A, divide it by π and then take the square root to find r.
698278
['For a square with side length s , the following formulas are used.', 'Perimeter = 4s.', 'Area = s2.', 'Diagonal = s√2.', 'For a circle with radius r , the following formulas are used.', 'Circumference = 2πr.', 'Area = πr2.']
1084097
Divide the area of the circle by π, and then calculate the square root to find the radius. For example, the area of the circle is 100 square feet. Dividing by π equals 31.839. The square root of 31.839 is 5.649 feet.
2791
Solve the equation for the diameter of the circle, d= C/π. In this example, "d = 12 / 3.14." or "The diameter is equal to twelve divided by 3.14." Divide the circumference by pi to get the answer. In this case, the diameter would be 3.82 inches.
1455378
The area of a circle is: π (Pi) times the Radius squared:A = π r2. or, when you know the Diameter:A = (π/4) × D2.
839005
multiply. pi times diameter. solve for circumference of a circle.
1044815
If you know the radius of the circle, double it to get the diameter. The radius is the distance from the center of the circle to its edge. If the radius of the circle is 4 cm, then the diameter of the circle is 4 cm x 2, or 8 cm. If you know the circumference of the circle, divide it by π to get the diameter.
348700
The formula to find the diameter states the relationship between the diameter and the radius. The diameter is made up of two segments that are each a radius. Therefore, the formula is: Diameter = 2 * the measurement of the radius. You can abbreviate this formula as d=2r.
410917
The two formulas that are useful for finding the radius of a circle are C=2*pi*r and A=pi*r^2. We use algebra skills in solving for our variable r. We know that the constant pi is always 3.14.
608307
First, note the definition of radius and diameter. The radius is one-half the diameter or the diameter is twice the length of the radius. Next, multiply the radius by 2 to get 6. The answer is 6.
1415711
['Measure the circular base to get the diameter.', 'Divide the diameter by 2 to get the radius.', 'Calculate the area with the formula: A = πr^2, where r is the radius.', 'Measure the height of the cylinder.', 'Multiply the area by the height to get the Volume.']