0
Still curious? Ask our experts.
Chat with our AI personalities
CoachSuccess isn't just about winning—it's about vision, patience, and playing the long game.
Chat with Coach
ProfessorI will give you the most educated answer.
Chat with Professor
ViviYour ride-or-die bestie who's seen you through every high and low.
Chat with ViviAdd your answer:
Earn +20 ptsQ: An 18 gon has how many diagonals?
Write your answer...
Submit
Still have questions?
Continue Learning about Geometry
How many diagonals in 18-gon?
Using the diagonal formula: 0.5*(182-54) = 135 diagonals
How many diagonals are in a 24-gon?
252 diagonals
How many diagonals in a 15-gon?
0.5*(152-45) = 90 diagonals
How many diagonals in 25-gon?
There are 275 diagonals in a 25 sided polygon
How many diagonals in a regular 46-gon?
many triangles does a regular 46-gon have
Trending Questions
What is the area of a circle that is 6.8 yd?
Can you draw an acute scalene triangle?
Is OP a radius the center or a diameter?
150 feet x 100 feet acres?
If the total area of a dartboard is 20000 mm and the area of the bull's is 800 mm what is the probability of getting a bull's?
How big is 800 square feet?
How big is 2.2million acres?
Can two angles of a kite be consecutive and obtuse?
Can A scalene triangle can have a right angle?
How much does it Cost install ceramic tile northeast us?
Names and pictures of all 2d shapes?
What did Euclid get wrong?
How many atoms would fit in side by side in a 1mm space?
What shape am i am a solid with 5 faces 8edges and 5 vertices?
Who is a person who creates plans that are used to construct buildings?
What is naturally raised area of land not as high as a mountain?
What is the sum of a 90-gon?
How many square feet in 30 x60?
What is perimeter of regular decagon with 8 mm sides?
What is the name of a two sided shape?
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.