0
A number is triangular if that number of dots could be arranged into a filled equilateral triangle.
It is perhaps easiest to picture with billiard balls in a triangle. Each 'row' of the triangle has one more ball than the row above it, forming an equilateral triangle.
The triangular numbers are 1, 3, 6, 10, 15 and so on.
The complete set of triangular numbers can be represented by the formula:
Tn = n(n+1)/2
Where n is any integer greater than 0.
Still curious? Ask our experts.
Chat with our AI personalities
DevinI've poured enough drinks to know that people don't always want advice—they just want to talk.
Chat with Devin
JordanLooking for a career mentor? I've seen my fair share of shake-ups.
Chat with Jordan
RafaThere's no fun in playing it safe. Why not try something a little unhinged?
Chat with RafaAdd your answer:
Earn +20 ptsQ: What does it mean if a number is triangular?
Write your answer...
Submit
Still have questions?
Continue Learning about Math & Arithmetic
Is 63 a Triangular Number?
Is 63 a triangular number I think it is a triangular number.
What is a number that is a triangular number and a triangular number?
013
Is 18 a triangular number?
No, 18 is not a triangular number.
Is 35 a triangular number?
No, 35 is not a triangular number.
Is 23 a triangular number?
yes it is a triangular number
Trending Questions
What is x when in an expression it is the form of x?
What are the uses of rolle's theorem?
What is the name of the numbers in a addition problem?
How many sides on a dodecagon?
What numbers do you multiply together to get 172?
What are sums or pairs?
Can you make a decision without two options?
What is 31 - -6?
How do you write thirty thousand in digits?
What numbers go into 289?
This physical property says ther are three types of lines straight curved and?
What is the value of r for a diatomic gas?
What is the prime factorizatioin of 105?
Why is 26 even?
How old would somebody be if they were born in 1734?
Have you ever have to call 911?
Why is Betyany called the house of figs?
In 1969 the price of 5 kilograms of flour was 0.75 cents In 1970 the price was increased 15 percent In 1971 the 1970 price was decreased by 5 percent what was the price of 5 kilograms of flour in 1971?
How many 9's are there in the numbers from 1-100?
What is the positive square root of 13?
Copyright ©2025 Infospace Holdings LLC, A System1 Company. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Answers.