Swift Program to Calculate Area and Perimeter of Equilateral Triangle

This tutorial will discuss how to write swift program to calculate area and perimeter of equilateral triangle

A triangle whose all sides and angles are equal is known as the equilateral triangle. Each angle of equilateral triangle is 60 degrees. It is also known as 3-side polygon.

Area of Equilateral Triangle

The amount of space occupied between the three lines of the triangle is known as the area of the equilateral triangle.

Formula

Following is the formula −

Area = √3x2/ 4

Here x is the side of the equilateral triangle.

Below is a demonstration of the same −

Input

Suppose our given input is −

Side = 4

Output

The desired output would be −

Area of the equilateral triangle: 6.928203230275509

Algorithm

Following is the algorithm −

Step 1 - Create a function with return value.

Step 2 - Calculate the area of the equilateral triangle using the following formula −

let result = (sqrt(3) * side * side)/4

Step 3 - Calling the function and pass the side in the function as a parameter.

Step 4 - Print the output.

Example

The following program shows how to calculate area of the equilateral triangle.

import Foundation
import Glibc

// Creating a function to calculate area of the equilateral triangle
func equiTriangle(side: Double){
   let result = (sqrt(3) * side * side)/4
   print("Area of the equilateral triangle: \(result)")
}

// Side of the equilateral triangle
var x = 10.0
print("Side: \(x)")

// Calling function
equiTriangle(side:x)

Output

Side: 10.0
Area of the equilateral triangle: 43.301270189221924

Here, in the above program we create a function which return area of the equilateral triangle using the following formula −

let result = (sqrt(3) * side * side)/4

Here we enter side = 10, hence the area is 43.301270189221924.

Perimeter of Equilateral Triangle

The distance around the edges of the equilateral triangle is known as the perimeter of the equilateral triangle.

Formula

Following is the formula −

Perimeter = 3x

Here x is the side of the equilateral triangle.

Below is a demonstration of the same −

Input

Suppose our given input is −

Side = 7

Output

The desired output would be -

Perimeter of the equilateral triangle: 21

Algorithm

Following is the algorithm −

Step 1 - Create a function with return value.

Step 2 - Calculate perimeter of the equilateral triangle using the following formula −

let result = 3 * side

Step 3 - Calling the function and pass the side in the function as a parameter.

Step 4 - Print the output.

Example

The following program shows how to calculate perimeter of the equilateral triangle.

import Foundation
import Glibc

// Creating a function to calculate the perimeter

// of the equilateral triangle.
func periTriangle(side: Int){
   let result = 3 * side
   print("Perimeter of the equilateral triangle: \(result)")
}

// Side of the equilateral triangle
var x = 4
print("Side: \(x)")

// Calling function
periTriangle(side:x) 

Output

Side: 4
Perimeter of the equilateral triangle: 12

Here, in the above program we create a function which return the perimeter of the equilateral triangle using the following formula −

let result = 3 * side

Here we enter side = 4, hence the mid-point is 12.