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A diameter is a line and can be measured in any units of length although some may be more useful units than others. The diameter of a galaxy may be measured in light years, that of a ferris wheel in metres, a car tyre in centimetres, etc. The diameter of a galaxy may be measured in centimetres but you'll simply end up with a very large number.
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If a circle has a diameter of 28 what is the circumference of it?
The circumference of a circle with a 28 unit diameter is: 88cir=dx22/7
What is the radius of a circle 26.4 cm?
The radius of a circle is the distance from the center of the circle to any point on its circumference. If the radius of a circle is given as 26.4 cm, then that means the distance from the center to the edge of the circle is 26.4 cm. This measurement is constant for any point on the circle, as all points on the circumference are equidistant from the center.
How many meters in 30 diameters?
There is no such unit of measurement as a diameter, a diameter is the length across something. Perhaps you are thinking of a decimetre.
How are square units and units different?
In the context of length, a unit is a measure of distance, whereas a square unit is a measure of area.
How many square meters in a DVD?
I suggest you measure the DVDs radius (or measure its diameter and divide that by 2). Then you can use the formula for the area of a circle.
