I'm an overconfident new quilter. I decided to make a throw for my daughter using 6 1/2 in squares on point. My problem is that for the triangles on the sides I cut the 6 1/2 squares diagonally in half and they seem too small. Is there a calculation for figuring this out? I thought that maybe I should cut the squares 7" and cut those in half diagonally but those seemed too big. should I cut squares 6 3/4"? If someone could offer me some sage wisdom and advice on my predicament I'd so appreciate it.Seems like it should be simple .........