Plot half circles between 2 points with known radius

avatar822

New Member
Joined
Dec 30, 2020
Messages
2
Office Version
  1. 365
Platform
  1. Windows
I need excel to plot a half circle between 2 points located on the x axis of a scatter chart with a radius of half the difference between the the 2 points. The plot needs to start on the X axis and extend above it. I actually need 3 half circles which which increase in size to the right of the Y axis.

And then to complicate things further, I need to plot a line that is tangent to the 3 plotted circles and figure out the angle and intercept of that line.
 

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yky

Well-known Member
Joined
Jun 7, 2011
Messages
1,880
Office Version
  1. 2010
Platform
  1. Windows
I need excel to plot a half circle between 2 points located on the x axis of a scatter chart with a radius of half the difference between the the 2 points. The plot needs to start on the X axis and extend above it. I actually need 3 half circles which which increase in size to the right of the Y axis.

And then to complicate things further, I need to plot a line that is tangent to the 3 plotted circles and figure out the angle and intercept of that line.
This is all is needed to plot one half circle. If you want more points between A and B, say, 40 points, you'll need to fill the formulae in the range A3:B43.

Cell Formulas
RangeFormula
A3:A23A3=$A$2+($B$2-$A$2)/$C$2*(ROW()-3)
B3:B23B3=(($B$2/2-$A$2/2)^2-(A3-($B$2+$A$2)/2)^2)^(1/2)
 

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