why circles of small of diameter looks like polygon in catia v5?


This is a visualization problem. Change the following settings, see images.
-
Step 1:
Go to 'Tools'- 'Options'
-
Step 2:
Go to 'Display' and increase 'Accuracy'
If you don't receive the email within an hour (and you've checked your Spam folder), email us as confirmation@grabcad.com.