Pentagonal number A visual representation of the first six pentagonal numbers A pentagonal number is a figurate number that extends the concept of triangular and square numbers to the pentagon, but, …

Figure 1 – Pentagonal Numbers Figure 1 illustrates the graphical view of three pentagonal numbers. Like square and triangle numbers, pentagonal numbers are figurate numbers. A figurate number is …

The meaning of PENTAGONAL is having five sides and five angles. How to use pentagonal in a sentence.

Pentagonal number A pentagonal number, like square numbers and triangular numbers, is a type of figurate number. A figurate number is a number that can be represented using a regular geometric …

Illustrated definition of Pentagonal Number: A number that can be shown as a pentagonal pattern of dots. The first five pentagonal numbers are 1, 5, 12, 22...

Definition of 'pentagonal' pentagonal in British English adjective (of a polygon) having five straight sides

Definition of pentagonal adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

pentagonal (comparative more pentagonal, superlative most pentagonal) Of, relating to, or shaped like a pentagon. quotations

Jul 23, 2025 · The first three pentagonal numbers are 1, 5, and 12 (Please see the below diagram). The n'th pentagonal number P n is the number of distinct dots in a pattern of dots consisting of the …

2 = 2 : The numbers 2 are called \pentagonal numbers" because they count the number of dots in a pentagonal pattern, just k(k+1) as the numbers n = and n = k2 are \triangular numbers" and \square …