# Base __

This crossword clue is for the definition: Base __.
it’s A 7 letters crossword puzzle definition.
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Last seen on: LA Times Crossword 13 Jul 2018, Friday

### Random information on the term “Base __”:

In geometry, a base is a side of a polygon or a face of a polyhedron, particularly one oriented perpendicular to the direction in which height is measured, or on what is considered to be the “bottom” of the figure. This term is commonly applied to triangles, parallelograms, trapezoids, cylinders, cones, pyramids, parallelepipeds and frustums.

Bases are commonly used (together with heights) to calculate the areas and volumes of figures. In speaking about these processes, the measure (length or area) of a figure’s base is often referred to as its “base.”

By this usage, the area of a parallelogram or the volume of a prism or cylinder can be calculated by multiplying its “base” by its height; likewise, the areas of triangles and the volumes of cones and pyramids are fractions of the products of their bases and heights. Some figures have two parallel bases (such as trapezoids and frustums), both of which are used to calculate the extent of the figures.

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The extended base of a triangle (a particular case of an extended side) is the line that contains the base. The extended base is important in the context of obtuse triangles: the altitudes from the acute vertices are external to the triangle and perpendicularly intersect the extended opposite base (but not the base proper).

### Random information on the term “TEN”:

10 (ten) is an even natural number following 9 and preceding 11. Ten is the base of the decimal numeral system, by far the most common system of denoting numbers in both spoken and written language. The reason for the choice of ten is assumed to be that humans have ten fingers (digits).

As is the case for any base in its system, ten is the first two-digit number in decimal and thus the lowest number where the position of a numeral affects its value. Any integer written in the decimal system can be multiplied by ten by adding a zero to the end (e.g. 855 × 10 = 8550).

The Roman numeral for ten is X (which looks like two Vs [the Roman numeral for 5] put together); it is thought that the V for five is derived from an open hand (five digits displayed), and X for ten from both hands. Incidentally, the Chinese word numeral for ten, is also a cross: 十.

The digit ‘1’ followed by ‘0’ is how the value of p is written in base p. (E.g. 16 in hexadecimal is 10.)

The SI prefix for 10 is “deca-“.