I'm trying to calculate the length of a chord so that the area of the segments = 15% & 85% respectively. all I know is the diameter. anyone have a simple solution?

I'm trying to calculate the length of a chord so that the area of the segments = 15% & 85% respectively. all I know is the diameter. anyone have a simple solution?

john matthews wrote:

I'm trying to calculate the length of a chord so that the area of the segments = 15% & 85% respectively. all I know is the diameter. anyone have a simple solution?

If your arc length is 15% of the circumference (you already know the diameter) so you could 1) construct two lines of length 'd' which share a common endpoint and are at an angle with each other of 15% of 360°, then measure between the two other endpoints. Or 2) you could look up the formula in almost any geometry book. An alternative (since you are already on the internet - inferred since you are using this forum) is 3) google it on bing.

John,

There is a very good calculator here.