Until the invention of the ruler, the greeks were not able to construct equilateral trianglesa)trueb)false

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°?

Ab based on the given diagram, if m_1 = 60° then m 2 = 30 60 90 180

Factor the expression using gcf 9b+45