# What is a triangular number?

Triangle numbers A number is a triangle number if we can arrange that number of objects into a triangle, like so: - Read more

... 10 is a triangular number because 1 + 2 + 3 + 4 = 10. A triangular number is calculated by the equation: This short article about mathematics can be made longer. - Read more

## What is a triangular number? resources

### What's a number? - Cut-the-Knot

Triangular numbers owe their name to a similar construction, now of triangles. Actually we already used triangular numbers in the proof of Lemma 3 above.

### Math Magic - Triangular Numbers

HOME. Miscellaneous. Elementary GCD LCM Definitions. Percents. Ratios. Square Roots. Reverses. Junior High Cube Roots. Mult By 9 (#1) Mult By 9 (#2)

### Triangular number - Wikipedia, the free encyclopedia

A triangular number or triangle number counts the objects that can form an equilateral triangle, as in the diagram on the right. The nth triangle number is the number ...

### Triangular Numbers - Mathematische Basteleien

What are Triangular Numbers? These are the first 100 triangular numbers: The sequence of the triangular numbers comes from the natural numbers (and zero), if you ...

### What Is a Triangular Number? - HubPages

Triangular Numbers do not need to cause confusion! Come in and see some of them.

### Triangular Number -- from Wolfram MathWorld

Triangular Number. 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 ...

### What does triangular number mean? - definitions

Definition of triangular number in the Definitions.net ... starting at the 0th triangular number, is: The triangle numbers are given by the following explicit ...

A triangular number is a natural number such that the shape of an equilateral triangle can be formed by that number of points. Every triangular number can ...

### Triangular Number | Online references | cyclopaedia.net

References for "Triangular Number" online, at universities and in literature... cyclopaedia.net

### Triangular and Square Numbers - UCLA Department of Mathematics

(c) The third triangular number, which we write as T 3; is 6. i. Why are 4 and 5 not triangular numbers? (d) What is T 4; the fourth triangular number?

### Square Triangular Number -- from Wolfram MathWorld

A number which is simultaneously square and triangular. Let T_n denote the nth triangular number and S_m the mth square number, then a number which is both triangular ...

### Triangular Numbers | Azimuth

If you think a bit, you’ll see: • In the first triangle, the product of all numbers in the nth row is • In the second, the product of all numbers in ...

### Definition of Triangular Number - Math is Fun - Maths ...

A number that can make a triangular dot pattern. Example: 1, 3, 6, 10 and 15 are triangular numbers.

### Definition Of Triangular Number - Math Help for Parents ...

Triangular Number: A number that can be represented by a triangular array. Math A Tube Glossary, Videos, Pictures, and Text.

### Triangular Numbers (Part III) - Is all about math

Going back once more to the original problem of finding a formula to compute the n triangular number. ... Triangular numbers suggest by their name the idea of ...

### Triangular Numbers - Math Forum - Ask Dr. Math

Triangular Numbers Date: 4/11/96 at 10:37:41 From: Anonymous Subject: Triangular Numbers What is a Triangular Number? I have tried to look it up in my brother's math ...

### Triangular Number - World News

Triangular Numbers, Algebraic Equation for Triangular Numbers : Algebra Lessons, Triangular Numbers, Triangular Numbers (I), Triangular Numbers - Corbettmaths, Tarte ...

### Triangle Numbers - PerlMonks

I read about triangle numbers in book by Clifford Pickover, I forget which one. Triangle numbers are numbers of the form 0+1+2+3...n, or .5*n*(n+1).

### Ancient Greek Mathematics: Geometric Numbers: Triangular ...

Triangular number and sums Triangular numbers are so called because they can be arranged in a triangular array of dots (elements). Consider ...

### Triangular Numbers (Part I) - Is all about math

Going back in history more than two thousand years Pythagoras and the Pythagoreans were interested in establishing relations between geometric figures and numbers.If ...

### Triangular Numbers - Teaching Ideas

Triangular numbers are those numbers that can be formed by counting the number of objects used in making a triangle. 1) Ask the children to make ...

### Fascinating Triangular Numbers By Shyam Sunder Gupta

Properties of triangular numbers including reversible, happy, harshad, highly composite, deficient, abundant ones.

### Triangular numbers - NZMaths

Triangular Numbers Number and Algebra, Level 3 The Problem. Triangular numbers are made by forming triangular patterns with counters. Riwa has made the first four ...

### Triangular Numbers | nzmaths

Problem. Triangular numbers are made by forming triangular patterns with counters. Riwa has made the first four triangular numbers with blue counters.

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