http://geocaching.com.au/toolbox/lineintersect/
http://geocaching.com.au/toolbox/circleintersect/
http://geocaching.com.au/toolbox/lineintersectbearing/

The maps only show the final result, which means you cannot see visually what happened. Would it be possible to show the original coordinates on the map too, with the circles and lines drawn so you can see what you got and how you got it?

Also, the coordinates, could they be linked to the Coordinate conversion page so that you can easily convert them?

I'll have to have a look at what I can find in order to drawl the lines. Our map capability is a but kludgy, so I will need to balance the benefit of seeing the lines on the map vs. getting the co-ordinates (which is the final desired result). Alas, I am not endowed with endless time.