When teams of same size are formed from three groupsof 512 430 489

When you are making a circle graph by hand, how do you convert a number for a part into its corresponding angle measure in the circle graph? when you are making a circle graph by hand, what should you do if one of your angle measures is greater than 180°?

Can someone check if i did this correct. it’s number 4 if you’re wondering.

Free points also plz look my profile and answer really stuff