âThe perimeter of the inner polygon is shorter than the circumference of the circle, while that of the outer polygon is longer.â âZenodorus studied the area of a figure with a fixed perimeter and the volume of a solid figure with fixed surface.â
Social Security generally defines substantial earnings as a certain dollar amount. In 2017, generally $1,170.00 earnings per month is substantial for non-blind workers and $1,930.00 is substantial work for the blind. These amounts refer to your gross earnings if you are an employee and your net profit if you are self-employed.
In 2017, the average Social Security benefit paid to retired workers is $1,360 per month. However, the amount of money each retired worker receives in Social Security benefits varies widely. As you can see in the following chart, most people receive between $700 and $1,800 in Social Security income per month.