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The Mathematica function Area knows about Sphere. For example the following output.

Area[Sphere[]]

4 Pi

Does this mean each function knows about the other? Is there a way to find out which functions knows about which? For example is there a way to find out what all other functions Area is aware of?

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    $\begingroup$ if you look at help for Area it says it gives area for 2D region. And under scope, you will see list of regions it knows about. Basically any ref/Region it should give its area. $\endgroup$
    – Nasser
    Commented Oct 4, 2021 at 7:39

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Those functions are in the System` path, which is automatically loaded.

See https://reference.wolfram.com/language/ref/$ContextPath.html

and ?System`* to see the included functions.

There is a post here where jVincent excludes the System context for testing.

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  • $\begingroup$ I am not looking for where Mathematica loads the function's from. I am looking for information on how one function knows about the other. Is there a way to find what all the other inputs the Area function would support $\endgroup$
    – Talespin_Kit
    Commented Oct 4, 2021 at 6:55

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