Drawing concentric circles in Fireworks (scientifically)

You need two circles, one larger than the other, with different fill colors.

You can drag out an ellipse holding the Ctrl key to make it a circle. Note that the height and width have to be equal for it to be a circle.

Note the width of the larger circle, Let it be X

Let the width of the smaller circle be Y

Fit the canvas to the width of the larger circle.

Now, the position of the Left of larger circle is 0, and the right of it (Left+Width=0+width) is equal to its width.

Calculate position of left of smaller circle as follows:

Left [Smaller]=X/2 -Y/2

Top[Smaller]=Left

If you need to position text at the exact centre of the smaller circle, you’d do it like this:

Left of Text=Left of smaller circle+Width of Smaller circle/2 – Width of Text/2

Height of Text=Top of Smaller circle+Height of smaller circle/2 – Height of Text/2