bottom
In the plane geometry, the bottom generally refers to the bottom of the general polygon edge, but with the different types of graphics, the bottom of the definition will be different. In the three-dimensional space at the end of the general known as the bottom, four-dimensional space is called the bottom cell. In the trapezoid, the bottom refers to a group of flat sides, which is called the upper end, and the bottom is called the bottom in the triangle, generally referred to as has been found in a vertical side of the edge, so the bottom of the known triangle Can be an area: 1/2 bottom * high, but the right triangle, as long as another stock for the end, the other is high. In addition, the isosceles triangle, in addition to the other side of the other side called the end. In a regular polygon, each edge can be used as a bottom edge. ...