Tags Math and Arithmetic Geometry

Animals & Plants Arts & Entertainment Auto Beauty & Health Books and Literature Business Electronics Engineering & Technology Food & Drink History Hobbies Jobs & Education Law & Government Math People & Society Science Social Studies Sports Travel & Places

0

Subjects>Math>Other Math

How many diagonals does an octadecagon have?

Anonymous

∙ 13y ago

Updated: 4/28/2022

The formula for the number of diagonals (that is, lines joining non-adjacent vertices) belonging to any shape is n(n-3)/2. Therefore, an eighteen-sided polygon has 18 x (18 - 3)/2 = 135 diagonals.

Wiki User

∙ 13y ago

Still curious? Ask our experts.

Chat with our AI personalities

Ezra

Faith is not about having all the answers, but learning to ask the right questions.

Chat with Ezra

Maxine

I respect you enough to keep it real.

Chat with Maxine

Fran

I've made my fair share of mistakes, and if I can help you avoid a few, I'd sure like to try.

Chat with Fran

Add your answer:

Earn +20 pts

Q: How many diagonals does an octadecagon have?

Write your answer...

Submit

Still have questions?

imp

Continue Learning about Other Math

How many sides does an octadecagon have?

An octadecagon, also called an octakaidecagon, has 18 sides, from the Greek octa-, signifying 8, the connector -kai-, and deca- signifying 10.

How many diagonals does a quadrilateral?

2 diagonals

How many diagonals does a square have?

It has 2 Diagonals!!!

How many diagonals has a nonagon have?

It has 27 diagonals

how many diagonals have haptagon?

14 diagonals

Trending Questions

Is 1 yard and 9 inches bigger than 44 inches? What decimal lies halfway between 0.5 and 0.9? What is the vertical motion formula? What does it mean when a guy rates you 69? Area of circle with radius of 5? How do you write 0.002537 using three significanat figures? Equate 28 dollars an hour? What is 1500 divided by 36? Explain Why a number which ends in 3 cannot be a multiple of 4? What is the product of -7 and -5? What does a cm represent? Six more than eight times a number equals thirty what number will you right? Which decimal is bigger 1 or 10? What are two consecutive number with the product of 2756? What is 21x5? What is the important skills for being a math teacher? How many 2D shapes are there and what are they? What are the multiples of 8 up to 100? The astronomer who agreed with the heliocentric theory and was imprisoned for his investigations was? What is a variational matrix?

Resources

Top Categories

Product

Company

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.