Triangular number: Difference between revisions
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{{Wikipedia}} | |||
A '''triangular number''' or '''triangle number''' (T<sub>''n''</sub>) is a number of the form ''n''(''n'' + 1)/2 where ''n'' is a nonnegative integer. It equals the sum of integers starting at 1 up to ''n'', and is the amount of objects in a dense planar equilateral arrangement. A [[superparticular ratio]] whose numerator is a triangular number is a [[triangle-particular]]. | |||
Triangular numbers are used in the formation of [[highschool scales]]. | |||
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== See also == | == See also == | ||
* {{OEIS|A000217}} | |||
[[Category:Elementary math]] | |||
[[Category: | |||
Latest revision as of 12:55, 31 July 2026
A triangular number or triangle number (Tn) is a number of the form n(n + 1)/2 where n is a nonnegative integer. It equals the sum of integers starting at 1 up to n, and is the amount of objects in a dense planar equilateral arrangement. A superparticular ratio whose numerator is a triangular number is a triangle-particular.
Triangular numbers are used in the formation of highschool scales.
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