Correct definition for the Triangle inequality

[matthewfischer]

"or equal to" was missing.

In mathematics, the triangle inequality states that for any triangle,
the sum of the lengths of any two sides must be greater than or equal to
the length of the remaining side.

Source: https://en.wikipedia.org/wiki/Triangle_inequality

[NobbZ]

We need to be careful with this. There has been some discussion around this
some time ago. One of the problems is that some tracks do it as described
in the read me and others as it is defined in mathematics. Can't search or
link right now, because I'm on mobile right now.

Am 19.07.2016 20:45 schrieb "Matt Fischer" notifications@github.com:

"or equal to" was missing.

In mathematics, the triangle inequality states that for any triangle,
the sum of the lengths of any two sides must be greater than or equal to
the length of the remaining side.

Source: https://en.wikipedia.org/wiki/Triangle_inequality

You can view, comment on, or merge this pull request online at:

#298
Commit Summary

• Correct definition for the Triangle inequality

File Changes

• M triangle.md
  https://github.com/exercism/x-common/pull/298/files#diff-0 (4)

Patch Links:

• https://github.com/exercism/x-common/pull/298.patch
• https://github.com/exercism/x-common/pull/298.diff

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[matthewfischer]

Maybe we could just explain that in the README and post a link to the mathematical definition?

[petertseng]

The previous discussion was at #202 and mainly centered around whether tracks should have tests for cases when a + b = c. Regardless of what the answer to that question is, the README should at least give the correct definition.

So I say 👍 to this.