Then I start the circle center from one significant point and try to connect two more points (precisely) on the radius.
To arrive at the point I derived I used a consistent acceleration rate from an angle and 2 right diagonals point to the same place at the proper radius. This is a test. If I nail it...then I did something right. My price and time guess are on the chart.
I marked the time wrong. It should be 9:00. Was looking at the date. Price is right though.
This method is really about combining 2 intersecting angle relations/with radius distances from a circle.