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.
Show the angles below using two pencils. Try to âseeâ the circle that is traced out in the air. This is a 1-degree angle! an obtuse angle; 127Â°. a right angle; 90Â°. How to measure an angle with a protractor 1  : Place the midpoint of the protractor on the VERTEX of the angle. 2  Line up one side of the angle with the zero line of the protractor (where you see the number 0). 3  Read the degrees where the other side crosses the number scale.
Right angles have their own symbol, which is a square in the corner where the two lines of the angle meet. Math has six kinds of angles: acute, right, obtuse, straight, reflex and full. Acute and obtuse angles are defined in relation to right angles, as acute angles are less than 90 degrees and obtuse angles are between 90 and 180 degrees. A straight angle is exactly 180 degrees, and a full angle is exactly 360 degrees. Reflex angles fall between 180 and 360 degrees.