Having spent all of yesterday evening trying to put this together for Christine Barnes lesson and having just watched Edyta's show I thought it would be easy peasy. But it was not. Thanks for the maths Rosemary. it took a few reads before I understood it. Maths reads as blah blah blah to me first time around.
Having cut out enough fabric to do two stars for Christine's class last night I now find I will have to start again.
Thank goodness it's a new day everyday.
P. S. I just looked at the comments on lesson 1 of Christine's class and she says that we are meant to make mock-ups on the printout template and not actual stars. That explains why she didn't give the measurement of the diamond.