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  1. Triangular number - Wikipedia

    A triangular number or triangle number counts objects arranged in an equilateral triangle. Triangular numbers are a type of figurate number, other examples being square numbers and cube numbers.

  2. Triangular Number - Formula, Sequence, List, & Diagrams

    Dec 26, 2023 · What is a triangular number with formula, sequence, list, and diagrams. How to find a triangular number.

  3. Triangular Number Sequence - Math is Fun

    This is the Triangular Number Sequence ... 1, 3, 6, 10, 15, 21, 28, 36, 45, ... ... It is simply the number of dots in each triangular pattern

  4. Triangular Number Sequence - GeeksforGeeks

    Jul 23, 2025 · Triangular Number is a sequence of numbers that can be represented in the form of an equilateral triangle when arranged in a series. The triangular numbers list includes numbers 1, 3, 6, …

  5. Triangular Numbers Calculator

    Polygonal numbers are a subset of figurate numbers and the more interesting of the two types. Triangular numbers are numbers you can arrange in the shape of an equilateral triangle. Note that …

  6. Triangular number - Math.net

    Triangular numbers are numbers that, when represented using regularly spaced dots, form an equilateral triangle. Other examples of figurate numbers include square numbers and pentagonal …

  7. Triangular Numbers - Math Steps, Examples & Questions

    Here you will learn about triangular numbers, including how to identify them and work with them in numerical and pictorial sequences. You will also learn how to find triangular numbers and determine …

  8. Triangular Number -- from Wolfram MathWorld

    The triangular number is a figurate number that can be represented in the form of a triangular grid of points where the first row contains a single element and each subsequent row contains one more …

  9. Triangular Numbers - Definition, Formula & Properties - AllMath

    Feb 1, 2024 · Triangular numbers are a sequence of numbers that can be visualized as the number of dots in an equilateral triangle arrangement. They are a subset of figurate numbers, which are …

  10. Triangular Numbers – Definition, Formula & List with Solved Examples

    Learn what triangular numbers are in Maths. See formulas, stepwise examples, and a full list up to 100 for easy understanding and quick revision.