In 2007, all households in the United States earned roughly $7.723 trillion. One half, 49.98%, of all income in the US was earned by households with an income over $100,000, the top twenty percent. Over one quarter, 28.5%, of all income was earned by the top 8%, those households earning more than $150,000 a year.ne key measure is the real median level, meaning half of households have income above that level and half below, adjusted for inflation. According to the Federal Reserve, this measure was $51,939 in 2013, below the 1999 peak of around $57,000.
Edges. An edge is a line segment that joins two vertices. This tetrahedron has 6 edges. And this pentagon has 5 edges: An edge can also be the boundary of a shape. Such as the circumference of a circle.
2. boundary-a line determining the limits of an area. bound, edge. line-a length (straight or curved) without breadth or thickness; the trace of a moving point. rim-the shape of a raised edge of a more or less circular object. margin, perimeter, border-the boundary line or the area immediately inside the boundary.