Its ok, I have found out how to do it. I downloaded a demo, and have had a play with it. I used the attach tool when drawing my lines and I also used radial lock which is useful because you don't have to keep changing the angle of the lines.

All I am a student at Alleynes High School, and we use this software to create simple shapes to cut out on our Boxford CNC router and also sign using our Roland vinyl cutter. I am also aware that you can cut card developments out and score them. As I am into shape making I have made an icosahedron, ...