is scale bar width and circel radius connect

[nhanvi]

Hello everyone,

I'm new to esri. I am wondering if scalebar width and circle radius are related to each other. For instance, when draw a circle with radius = 500km. It show create a 1000km diameter circle. the width of this circle should equal to the scale of 1000km ? 

[DanielFox1]

Hi @nhanvi 

The measurement of a 500km and 1000km diameter is correct. What coordinate system are you using?

Is there a big difference between the scale and the diameter?

I have included some links below which might help further answer your question, the following community article outlines a very similar question 

Issues with ArcGIS Pro scaling while creating radius

Create circles