Skip to content

Home
Subjects
Past Papers
Key Terms

My Courses

Select your courses

Subjects

History
Geography
Biology
Chemistry
Physics
Mathematics

Resources

Browse Courses
Past Papers
Key Terms & Definitions
Pricing

About

Sign Up
Log In
Privacy Policy
Terms of Service

© 2026 GradeGen.AI

Not affiliated with any exam board.

Triangular number — AQA Mathematics Definition | GradeGen.AI

Courses
Mathematics
Key Terms
Triangular number

GCSEAQA8300

Triangular number

Key term for AQA GCSE Mathematics, used in Sequences.

Definition

A number represented by a pattern of dots forming an equilateral triangle, generated by the formula $\frac{n(n+1)}{2}$ .

Exam Context

Triangular number appears in AQA GCSE Mathematics revision content for Algebra, especially Sequences and Special Sequences.

Algebra Sequences Special Sequences

Found in Revision Notes

Algebra

Common Number Patterns and Fibonacci Sequences

Sequences • Special Sequences

Related Key Terms

Additive property Cube number Fibonacci-type sequence Position-to-term rule (nth term)

Revise Mathematics with GradeGen.AI

Create a free account to access AQA GCSE Mathematics revision notes, track progress, and practise related key terms.

Sign Up to Start Revising Log In

Preceding terms

Term-to-term rule