185 (one hundred ndeighty-five) is the

natural number In mathematics, the natural numbers are the numbers 0, 1, 2, 3, and so on, possibly excluding 0. Some start counting with 0, defining the natural numbers as the non-negative integers , while others start with 1, defining them as the positive in ...

following 184 and preceding 186.

In mathematics

There are 185 different directed graphs on four unlabeled vertices that have at least one sink vertex, with no outgoing edges, 185 ways of permuting the squares of a

2\times 4

grid of squares in such a way that each square is one unit away from its original position horizontally, vertically, or diagonally, and 185

matroid In combinatorics, a matroid is a structure that abstracts and generalizes the notion of linear independence in vector spaces. There are many equivalent ways to define a matroid Axiomatic system, axiomatically, the most significant being in terms ...

s on five labeled elements in which each element participates in at least one basis.

The

Spiral of Theodorus In geometry, the spiral of Theodorus (also called the square root spiral, Pythagorean spiral, or Pythagoras's snail) is a spiral composed of right triangles, placed edge-to-edge. It was named after Theodorus of Cyrene. Construction The spiral ...

is formed by unit-length line segments that, together with the center point of the spiral, form

right triangle A right triangle or right-angled triangle, sometimes called an orthogonal triangle or rectangular triangle, is a triangle in which two sides are perpendicular, forming a right angle ( turn or 90 degrees). The side opposite to the right angle i ...

s. 185 of these right triangles fit within the first four turns of this spiral.

References

Integers {{Num-stub

In mathematics

See also

References