# How do you find the diagonal of a octagon?

## How do you find the diagonal of a octagon?

There are 20 diagonals in an octagon. The formula that is used to find the number of diagonals in any polygon is, Number of diagonals = n(n-3)/2; where ‘n’ represents the number of sides of the polygon. In this case, there are 8 sides in an octagon.

## How many diagonals does a regular octagon have class 8?

∴ The octagon has 20 diagonals. Hence, option C is the correct answer. Note: The octagon is a polygon in geometry, which has 8 sides and 8 angles.

## How do you find the number of diagonals?

Number of Diagonals = n(n-3)/2

This formula is simply formed by the combination of diagonals that each vertex sends to another vertex and then subtracting the total sides. In other words, an n-sided polygon has n-vertices which can be joined with each other in nC2 ways.

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## How many diagonals can a hexagon and octagon have?

A hexagon has 9 diagonals. A octagon has 20 diagonals.

## What is the diagonal of a polygon?

A more general definition of a diagonal of a polygon is a line segment that joins two vertices of the polygon which are not already joined by an edge of the polygon.

## How many diagonals are in a hexagon?

A regular hexagon has 9 diagonals.

## What is a diagonal Class 8?

A diagonal is a straight line that connects the opposite corners of the polygon through its vertex.

## What is the number of diagonals in a polygon of 12 sides?

54
In a polygon of 12 sides, no. of diagonals n(n−3)2=12(12−3)2=12×92=54.

## How many diagonals are in a triangle?

no diagonals
How many Diagonals Does a Triangle Have? A triangle has no diagonals. We know that a diagonal always connects any two non-adjacent (non-consecutive) vertices of a polygon. Since all the vertices of a triangle are connected by sides, no diagonals can be formed.

## Which polygon has equal diagonals?

The rectangle of a rhombus bisect each other and have equal diagonals .

## How many sides has a diagonal?

As applied to a polygon, a diagonal is a line segment joining any two non-consecutive vertices. Therefore, a quadrilateral has two diagonals, joining opposite pairs of vertices.

Polygons.
Sides Diagonals
7 14
8 20
9 27
10 35

## How many diagonals does a circle have?

A circle has infinite number of diameter and chords joining the infinite vertices. Both the diameters and chords are diagonals of the polygons of infinite number of vertices. Hence a circle has infinite number of diagonals.

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## How many diagonals are in a rectangle?

two diagonals
Diagonals are the line segments that connect two non-adjacent vertices of polygons. Rectangles have two diagonals that connect two opposite vertices. They are the same size.

## How many diagonal are there in a pentagon?

5 diagonals
From the figure, it is clear that a pentagon has 5 diagonals.

## What is the diagonal of a circle?

Diagonal of a square inscribed in a circle is equal to the diameter of the circle.

## What is a diagonal in hexagon?

A diagonal is a line segment joining two non-adjacent vertices of a polygon. A regular hexagon has six sides and six vertices. One vertex has three diagonals, so a hexagon would have three diagonals times six vertices, or 18 diagonals.

## How many diagonals are in a heptagon?

14 diagonals
The word heptagon is made up of two words, hepta meaning seven and gon meaning sides. There are 14 diagonals in a heptagon and in the given heptagon, the blue line segments represent the diagonals.

## What is diagonal of a square?

To calculate the diagonal of a square, multiply the length of the side by the square root of 2: d = a√2. So, for example, if the square side is equal to 5 in, then the diagonal is 5√2 in ≈ 7.071 in.

## What are adjacent sides for Class 6?

If two sides share a common angle, then they are called adjacent sides.

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