1 This implies that the other two sides are of equal length, and that the diagonals are of equal length. 2  An alternative definition is: a quadrilateral with an axis of symmetry bisecting one pair of opposite sides. 3  Trapezium (NAm.): no sides are parallel.
An enumeration date commonly refers to the official or control date set for a particular enumeration event such as a census. The official enumeration date may vary from one enumeration to the next. The enumeration date is a control function for collecting data over a broad space of time. All data collected is based on its validity as of a single date, no matter what date the information is taken within the enumeration period.
the last week of the iso week numbering year i e the 52nd or 53rd one is the week before week 01 this week s properties are it has the year s last thursday in it it is the last week with a majority 4 or more of its days in decembergnore the remainder the quotient equals the week number if the week number thus obtained equals 0 it means that the given date belongs to the preceding week based year if a week number of 53 is obtained one must check that the date is not actually in week 1 of the following year