- How many diagonals does a 13 gon have?
- How do you find diagonals?
- What is a 13 sided shape called?
- How many diagonals does a 17 gon have?
- How many diagonals does a gon have?
- How many diagonals does a Hexadecagon have?
- How many diagonals does a 9 sided polygon have?
- What is a 100 sided shape called?
- What do you call a 16 sided shape?
- How many diagonals does a 15 gon have?
- How many diagonals does a 20 gon have?
- How many diagonals does an 18 gon have?
- How many sides does a regular polygon have if the exterior angle is 45?

## How many diagonals does a 13 gon have?

65 diagonalsHow many diagonals does a 13-gon have.

n(n-3)/2 is the number of diagonals.

Explain in words why this works.

A 13-gon would have 13(13-3)/2 = 65 diagonals..

## How do you find diagonals?

The diagonal of a rectangle is 25 cm. If one of the rectangle’s sides is 15 cm, how do I calculate the area? Use the Pythagorean Theorem to find the other side. Then multiply the length by the width.

## What is a 13 sided shape called?

tridecagonIn geometry, a tridecagon or triskaidecagon or 13-gon is a thirteen-sided polygon.

## How many diagonals does a 17 gon have?

119 diagonalsThus, for a 17-sided polygon, there are 119 diagonals.

## How many diagonals does a gon have?

The number of diagonals in a polygon = n(n-3)/2, where n is the number of polygon sides. For a convex n-sided polygon, there are n vertices, and from each vertex you can draw n-3 diagonals, so the total number of diagonals that can be drawn is n(n-3).

## How many diagonals does a Hexadecagon have?

104 diagonalsPolygon with sixteen sides. It has 104 diagonals. The sum of its interior angles is 2520°. If the hexadecagon is a regular hexadecagon, each of its interior angles measures 157.5 °.

## How many diagonals does a 9 sided polygon have?

6 diagonalsSince there are 9 vertices in all, that’s a total of 9 – 3 = 6 diagonals we can draw: Since there are nine vertices, we should be able to do this nine times, right?

## What is a 100 sided shape called?

hectogonIn geometry, a hectogon or hecatontagon or 100-gon is a hundred-sided polygon. The sum of all hectogon’s interior angles are 17640 degrees.

## What do you call a 16 sided shape?

In mathematics, a hexadecagon (sometimes called a hexakaidecagon or 16-gon) is a sixteen-sided polygon.

## How many diagonals does a 15 gon have?

90 diagonalsTherefore, there are 90 diagonals in a 15 sided polygon.

## How many diagonals does a 20 gon have?

170Find out how many diagonals does that 20-sided polygon contain. Solution: In a 20-sided polygon, the total diagonals are = 20(20-3)/2 = 170. But, since one vertex does not send any diagonals, the diagonals by that vertex needs to be subtracted from the total number of diagonals.

## How many diagonals does an 18 gon have?

135We can easily find out the total diagonals of an 18 sided polygon using the formula n(n-3)/2. Which will give us the no. of diagonals = 135.

## How many sides does a regular polygon have if the exterior angle is 45?

8Sum of exterior angle of any polygon is 360o . As each exterior angle is 45o , number of angles or sides of the polygon is 360o45o=8 .