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what is the formula of circle diameter. Therefore the relation between Radius and Diameter is Diameter 2 times Radius Formula for Area and circumference in Terms of Diameter. Thus the diameter formula is Diameter 2 the measurement of the radius.
So the length AZ equals a so the length of EZ and therefore of DF is c - a. Therefore Diameter 2 2 Radius. In the figure above drag the orange dots around and see that the diameter never changes.
The diameter is essentially composed up of two segments that are each a radius.
If you draw two opposing line segments from the circles origin to the edge you just drew the diameter. If you draw two opposing line segments from the circles origin to the edge you just drew the diameter. Area and circumference of circles. If the diameter of the circle is given then the formula for circumference is pd where d is the diameter.