findPerimeterIsoscelesTriangle()

Step 1: Understanding Isosceles Triangle

An isosceles triangle is a triangle with two sides of equal length. Therefore, the perimeter of an isosceles triangle can be calculated as twice the length of the equal sides plus the length of the base.

Step 2: Define the Function

Let's start by defining a JavaScript function named findPerimeterIsoscelesTriangle. This function will take two parameters: equalSide and base. The equalSide parameter represents the length of the two identical sides of the triangle, and the base parameter represents the length of the third side which we call the base.

    function findPerimeterIsoscelesTriangle(equalSide, base){
     

    }

Step 3: Calculating Perimeter in the Function

Now inside our function, we will calculate the perimeter of the isosceles triangle. As mentioned earlier, it's the sum of twice the length of an equal side and the length of the base.

    function findPerimeterIsoscelesTriangle(equalSide, base){
        var perimeter = 2 * equalSide + base;

    }

You can notice that we used the var keyword to indicate that perimeter is a variable that will hold the result of our calculation.

Step 4: Return the Result

So far, we have calculated the perimeter inside our function, but it won't be useful unless we return the result. Add a return statement to the function to do this.

    function findPerimeterIsoscelesTriangle(equalSide, base){
        var perimeter = 2 * equalSide + base;
        return perimeter;
    }

Step 5: Test the Function

Lastly, you should always test your functions to make sure they work as expected. Let's call our function with some example arguments to check if it returns the correct result.

    console.log(findPerimeterIsoscelesTriangle(5, 10));  // should print 20
    console.log(findPerimeterIsoscelesTriangle(3, 8));  // should print 14

Conclusion:

You have now successfully defined a JavaScript function that calculates the perimeter of an isosceles triangle correctly! All the steps described here are part of the final function. Here it is again in its entirety.

    function findPerimeterIsoscelesTriangle(equalSide, base){
        var perimeter = 2 * equalSide + base;
        return perimeter;
    }

    console.log(findPerimeterIsoscelesTriangle(5, 10));  // should print 20
    console.log(findPerimeterIsoscelesTriangle(3, 8));  // should print 14

This function is now ready for more serious use and for further enhancement if necessary. Happy coding!