Can someone plz help me with this

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°?

Need same math paper but the back now i hope your able to read it cleary i need with hw

What is the simplified form of square root of 400 to the 100th power ?