If you know the radius, the diameter is 2R
If you know the circumference, the diameter is C/R
If you know the area ,the diameter is 4A/pi (pi=3.142)
If the circle is five feet across - that is the diameter.
Divide the circumference by pi, and that will give you the diameter.
The formula for the area of a circle is: area = pi x radius2. The radius is half the diameter.
The radius of a circle is half of its diameter
pi times the diameter
If the circle is five feet across - that is the diameter.
To find area of a circle using diameter, you use this formuler. Area=pi(diameter/2)(diameter/2)
You can divide the diameter by two.
Assuming you are talking about a circle:* If you know the radius of the circle, multiply that by 2. * If you know the circumference of the circle, divide that by pi. * If you know nothing, you need to measure either the radius, the diameter, or the circumference.
Divide the circumference by pi, and that will give you the diameter.
The formula for the area of a circle is: area = pi x radius2. The radius is half the diameter.
pi times the diameter
The radius of a circle is half of its diameter
Pi times the radius of the circle squared = area And diameter is simply the radius x 2, since the radius is half the length of the circle.
Take "pi" times the diameter of the circle. Pi = 3.14159 (ALWAYS) If circle has a diameter of 10cm, circumference 31.41cm If circle has a radius of 2inches, the circumference is 12.57 inches. (radius = 2, diameter = 4)
2 times pi times radius
The radius of a circle is from the middle to the edge, or half the diameter. The circumference is like the perimeter of the circle, and the formula is pi times the diameter.