This makes no sense. The 95 degree angle (which by the way I have calculated to be a bit higher) has no bearing on the size of the square at all. And I fail to see how one draws a rectangle using this image. What are we using and if you look Scott's diagram does not have 90 degree angles within the box. If we square the image like we should here is the resulting image.
Using this image I get the angle to be a bit higher.
Around 98.5 I should say.
Final results look something like this.
Of course Scott can surely show what I have done wrong and show us how he arrived at his conclusions, which by the way I have stated since day one are in error