Creating Your Own Unit Circle Using a compass (or a round container), carefully draw a unit circle on a separate sheet of paper, clearly indicating the x and y axes. Label the quadrants as I, II, III, and IV. The circumference is made up of an infinite number of points. For example, the points in the first quadrant have positive coordinates (+, +); the points in the second quadrant have negative x-coordinates and positive y-coordinates (-, +). Label four quadrants with the appropriate signs of coordinates. A complete revolution starting at 0 (or 0 radians) is 360 (or 2 radians). Label 0 = 360 as the point on the circle for the positive x-axis. Also show the radian measure 0 = 2 . Label degree and radian measures for the other three points as it revolves around the circle for the positive y-axis, negative x-axis, and negative y- axis. Constructing the Radii of Circle Quadrant I: Use a protractor and make a point on the circle at 30 . Draw a line passing through the center that intersects that point and a point in the opposite quadrant III. Label the point on the circle in quadrant I as 30