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8 inches across
If you want the area of a circle, and you know the diameter, then: A = pi*r^2, where r is the radius, and is 1/2 the diameter, so pi*(diameter/2)^2 = (pi/4)*(diameter)^2. If you want square inches, then make sure you have the diameter measurement in inches, first.
First you have to measure the diameter of the circle. The diameter is pi (pi is approximately 3.1415) times the diameter is the perimeter. Half the diameter is the radius and the area of a circle is pi times the radius squared. So for example, let us say that you have a circle with a diameter of 3 inches. The perimeter is then about 9.42 inches, and the area is about 7.07 square inches.
11.4 inches diameter and the radius was 17
First we have to find the radius because the diameter is twice the radius: 4/3*pi*radius3 = 28 radius = 1.883749459 (worked out by making the radius the subject of the formula) diameter = 3.767498918 or 3.77 inches to 2 d.p.
Allan Shugart invented the first floppy disk in 1967 which was 8 inches in diameter.
If 6 inches is the radius, replace it in the formula: A=pi x radius2. If 6 inches is the diameter, divide it by 2 first, to get the radius.
Nenah Cherry . Eagle Eye Cherry
diameter is the distance across a circle, from one side to another (radius is 1/2 way across a circle). To determine the size of 1 diameter, you would first have to know the size of the circle
Cherry
First of all, it would be: "How many square inches are in the moon. And second I would been the diameter of the moon in order to solve that problem. Sorry :(
Cherry Cherry