To install click the Add extension button. That's it.

The source code for the WIKI 2 extension is being checked by specialists of the Mozilla Foundation, Google, and Apple. You could also do it yourself at any point in time.

4,5
Kelly Slayton
Congratulations on this excellent venture… what a great idea!
Alexander Grigorievskiy
I use WIKI 2 every day and almost forgot how the original Wikipedia looks like.
What we do. Every page goes through several hundred of perfecting techniques; in live mode. Quite the same Wikipedia. Just better.
.
Leo
Newton
Brights
Milds

From Wikipedia, the free encyclopedia

One half
prefixes hemi- (from Greek)

semi-/demi- (from Latin)

Binary 0.1 or 0.011111111111...
Ternary 0.11111111111...
Decimal 0.5 or 0.499999999999...
Duodecimal 0.6 or 0.5BBBBBBBBBBBB...
Hexadecimal 0.8 or 0.7FFFFFFFFFFF...
Continued fraction [0; 1, 1] or [0; 2]
Single-precision

floating point

3F000000 (hex) =

00111111000000000000000000000000
(binary)

½
In UnicodeU+00BD
Related
See alsoFractions
One
Different from
Different from¼, ¾

One half is the irreducible fraction resulting from dividing one by two (2) or the fraction resulting from dividing any number by its double. Multiplication by one half is equivalent to division by two, or "halving"; conversely, division by one half is equivalent to multiplication by two, or "doubling." One-half often appears in mathematical equations, recipes, measurements, etc. Half can also be said to be one part of something divided into two equal parts.

For instance, the area S of a triangle is computed.

S = 1/2 × base × perpendicular height.

One half also figures in the formula for calculating figurate numbers, such as triangular numbers and pentagonal numbers:

and in the formula for computing magic constants for magic squares

The Riemann hypothesis states that every nontrivial complex root of the Riemann zeta function has a real part equal to 1/2.

One half has two different decimal expansions, the familiar 0.5 and the recurring 0.4999999... It has a similar pair of expansions in any even base. It is common to believe these expressions represent distinct numbers: see the proof that 0.999... equals 1 for a detailed discussion of a related case. In odd bases, one half has no terminating representation, only a single representation with a repeating fractional component, such as 0.11111111... in ternary.

Particularities in writing and language

Postal stamp, Ireland, 1940: one halfpenny postage due.
Postal stamp, Ireland, 1940: one halfpenny postage due.

12 is also one of the few fractions to usually have a key of its own on typewriters (see fractions). It also has its own code point in some early extensions of ASCII at 171. In Unicode, it has its own code unit at U+00BD (decimal 189) in the C1 Controls and Latin-1 Supplement block and a cross-reference in the Number Forms block, rendering as "½." The HTML entity is ½.

One half is also one of the few fractions which are commonly expressed in natural languages by suppletion rather than regular derivation: in English, for example, compare "one half" against other regular formations like "one-sixth".

It is acceptable to write one half as a hyphenated word, "one-half" or non-hyphenated, "one-half."

Code points

In the Unicode standard, the symbol ½ has the code point U+00BD ½ Vulgar Fraction One Half (HTML #0189· inherited from Latin-1)[1]

PC entry

  • Alt+0189 (keeping Alt pressed until all 4 digits have been typed on the numeric keypad only)

See also

References

  1. ^ "Unicode® Character Table". UT Unicode® Character Table. idea.informer.com. Retrieved 1 October 2019.
This page was last edited on 21 July 2021, at 20:12
Basis of this page is in Wikipedia. Text is available under the CC BY-SA 3.0 Unported License. Non-text media are available under their specified licenses. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc. WIKI 2 is an independent company and has no affiliation with Wikimedia Foundation.