Math · Topic 89 of 124
Triangular Numbers
⭐ MasteredTriangular numbers are numbers that can be arranged in a triangle of dots. The first few are 1, 3, 6, 10 and 15.
💡 Fun fact
Adding the first 10 counting numbers gives 55, which is a triangular number.
All about Triangular Numbers
Triangular numbers are numbers that can be arranged into a triangle of dots. The first few are 1, 3, 6, 10 and 15. Each triangular number is found by adding one more row to the triangle than the previous one.
Triangular numbers appear in many patterns in maths and nature.
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