. . . and this is using the precise angle values relating to the avenues."
Precise angle values determined with a plastic protractor on a computer screen? Did you read where I point out that I work as a surveyor? Let's talk precision.
"I went by the symetry of the whole design where most of these avenues are at the angle of 23.5 degrees, "
The point that I am making, and that you illustrate with the image linked to above, is that the map isn't symmetrical- you have 52 degrees on one side of the traingle and 53 on the other, 23.5 degrees in one corner and 21 in the other.
"I can see what you are saying about Pensylvania Avenue deflecting upwards from the 23.5-degree angle becoming 19.5 degrees to meet the CB and after it leaves the Whitehouse; when before the WH the avenue is 23.5 degrees. "
You are saying here that this is the first time that you noticed that Penn Ave is in three distinct segments, all with diff orientations.
"I said in my eariler post in similar words that my view is that in regard to Pensylvania Avenue that begins at 23.5 degrees to the White House, and from the White House alters to 19.5 degrees,"
and here you present the facts back as if it is a thesis of yours. So why did you label that section 21 degrees :
and why do you insist on drawing a straight line from the top of the triangle to the Capitol Building. Why do you not draw that line through Logan Circle and Mt Vernon Square, just as the left side of the triangle connects DuPont Cr and Washington Circle.
The lines of the triangle are formed by connecting the vertices of the pentagram. Your line misses Mt Vernon Square (that's the one on the right Don).