pentagonal numbers

6
Pentagonal Numbers Ion Andreea-Elena Clasa a VI-a D

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Page 1: Pentagonal numbers

Pentagonal Numbers

Ion Andreea-Elena

Clasa a VI-a D

Page 2: Pentagonal numbers

Introduction

A pentagonal number is a number that can be shown as a pentagonal pattern of dots.

Page 3: Pentagonal numbers
Page 4: Pentagonal numbers

General formula

Page 5: Pentagonal numbers

Examples

Page 6: Pentagonal numbers

Sources

http://www.math-magic.com/misc/pentagonal.htm

https://www.mathsisfun.com/definitions/pentagonal-number.html