# Program to find the area of an equilateral triangle

Program to find the area of an equilateral triangle on fibonacci, factorial, prime, armstrong, swap, reverse, search, sort, stack, queue, array, linkedlist, tree, graph etc.

## Program to find the area of an equilateral triangle

### Explanation

A Triangle is having all angles of 60 degrees and congruent sides, or equiangular triangle is called Equilateral Triangle.

Area of Equilateral Triangle= ( 1.73 × a × a)/4

where a is side.

### Algorithm

1. Define Values for side of triangle
2. Enter values in formula.
3. Print the Area.

O(1)

### Python

```a= 5
area = ( 1.73 * a*a) / 4
print("Area of Equilateral Triangle is: ");
print(area);
```

Output:

```Area of Equilateral Triangle is:  10.8125
```

### C

```#include<stdio.h>
int main()
{ float a, area;
a= 5;
area = ( 1.73 * a*a) / 4 ;

printf("\n\n Area of Equilateral Triangle is : %f",area);
return (0);
}
```

Output:

```Area of Equilateral Triangle is: 10.81250
```

### JAVA

```public class tops
{
public static void main (String args[])
{	float a = 5f ;
double area = ( 1.73 * a*a) / 4 ;
System.out.println("Area of Equilateral Triangle is:"+area);
}}
```

Output:

```Area of Equilateral Triangle is: 10.8125
```

### C#

```using System;
class Program
{   static void Main()
{
float  a = 5 ;
double area =  ( 1.73 * a*a) / 4 ;
Console.WriteLine("Area of Equilateral Triangle is :"+area);
}}
```

Output:

```Area of Equilateral Triangle is: 10.8125
```

### PHP

```<?php
\$a = 5 ;
\$area =   ( 1.73 * \$a * \$a) / 4;
echo("Area of Equilateral Triangle is: ");
echo(\$area);
?>
```

Output:

```Area of Equilateral Triangle is: 10.8125
```

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