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Triangle Numbers: Follow the Sequence

In this worksheet, students recognise the sequence of triangles and add in missing numbers.

'Triangle Numbers: Follow the Sequence' worksheet

Key stage:  KS 2

Year:  Year 5 Maths worksheets

Curriculum topic:   Number: Number and Place Value

Curriculum subtopic:   Solve Number Problems to 1 000 000

Difficulty level:  

Worksheet Overview

 Triangle numbers are formed by building triangle patterns as follows:



You can draw these shapes or use addition to continue the sequence.


You should learn at least the first few triangle numbers....


1,  3,  6,  10,  15,  21,  28  .....

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