What's the correct answer if during calculation we get the diameter for example 5.000003?

5.000 or 5.001?

Another example 14.999001?

Can all vertices be on the same line?

The smallest distance from the center to a polygon (for the outside center) must be approximately 1E-7.
Will such accuracy be enough?

What's the correct answer if during calculation we get the diameter for example 5.000003?

5.000 or 5.001? // My AC program is 5.000

Another example 14.999001? // 14.999

Can all vertices be on the same line? // No

The smallest distance from the center to a polygon (for the outside center) must be approximately 1E-7.
Will such accuracy be enough? //Maybe it is enough,but i think 1E-8 is better