The statistical mean can also be used to interpret statistical data. Some important properties make statistical mean very useful for measuring central tendency. Since Xi - X is the distance from a given number to the average. The numbers to the left of the mean are balanced by the numbers to the right of the mean.
In review, vertical angles are angles formed by the intersection of two lines while alternate interior angles, alternate exterior angles, corresponding angles and consecutive interior angles are formed by the intersection of two lines and a transversal.
Note: when we add up the Interior Angle and Exterior Angle we get a straight line, 180Â°. (See Supplementary Angles) A Polygon is any flat shape with straight sides. The Exterior Angles of a Polygon add up to 360Â°. In other words the exterior angles add up to one full revolution. Press Play button to see. (Exercise: try this with a square, then with some interesting polygon you invent yourself.) Note: This rule only works for simple polygons.