Diameter: Perbedaan antara revisi

== Matematika ==

 

 

Semua diameter '''d''' dalam suatu lingkaran atau bola mempunyai panjang yang sama, yaitu dua kali [[radius|"radius" atau "jari-jari"]] '''r'''.

: <math>d = 2r \quad \Rightarrow \quad r = \frac{d}{2}.</math>

 

| author = Toussaint, Godfried T.

| title = Solving geometric problems with the rotating calipers

<!--Image:Sign diameter.png|thumb|150px|Sign ⌀ from an [[AutoCAD]] drawing]]-->

{{distinguish|text=the Scandinavian letter "[[Ø]]", the [[empty set]] symbol {{italics correction|"}}''∅''" or the greek letter [[phi]] (Φ)}}

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The character will sometimes not display correctly, however, since many [[Typeface|font]]s do not include it. In many situations the letter ø (the Latin small letter o with stroke) is an [[typographic approximation|acceptable substitute]], which in Unicode is {{unichar|00F8|html=}}. It can be obtained in UNIX-like operating systems using a [[Compose key]] by pressing, in sequence, {{key press|[[Compose key|Compose]]}}{{key press|d}}{{key press|i}}{{citation needed|date=August 2015}} and on a Macintosh by pressing {{key press|Opt}} {{key press|O}} (the letter [[o]], not the number [[0 (number)|0]]).

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In [[German (language)|German]], the diameter symbol (German ''[[:de:Durchmesserzeichen|Durchmesserzeichen]]'') is also used as an [[average]] symbol (''Durchschnittszeichen'').

{{Div col}}

* [[Angular diameter]]

<!--* [[Conjugate diameters]]

* [[Diameter (group theory)]], a concept in [[group theory]]-->

 

* [[Eratosthenes]], yang menghitung diameter [[Bumi]] sekitar 240 SM.

 

<!--* [[Semidiameter]]

* [[Sauter mean diameter]]