Puzzle Maker Pro - JigSaw Triangles supports most of the features of JigSaw Squares, but of course some things are different because of the triangle shape.
Unlike Squares, Triangle shapes can never perfectly fill a square or rectangular image. As you can see in this screenshot, there will always be some partial (half) triangles at the left and right edges.
Triangles work best with Triangle or JigSaw connector types (or no connectors at all). With Square connectors you have to test and configure the length settings carefully, to make sure the connectors do not overlap.
Most screenshots for JigSaw Triangles use the "Perfect Triangles" option, since this usually looks good. This will create equilateral triangles. If you switch it off, you'll get isosceles triangles.
A special type of Triangles puzzle is the big triangle (called 'Pyramid' in this module).
As you can see in the screenshot, this will remove quite a few of the triangles (almost 50%), leaving a nice big pyramid in place. However, this will also leave a large part of your original image out of the puzzle.
Using Coordinates for Triangles puzzles is almost as easy as for Squares puzzles. The Rows will be numbered A, B, C, ...
Columns will be numbered 1, 2, 3, ... where 1 is the first column of half triangles.
When you use the pyramid option, many of the coordinates (positions) will not be used: