This program takes lengths of three sides and displays area of triangle.

const side1 = 5; 
const side2 = 6; 
const side3 = 7; 
const perimeter = (side1 + side2 + side3)/2;
const area =  Math.sqrt(perimeter*((perimeter-side1)*(perimeter-side2)*(perimeter-side3)));
console.log(area);

• w3resource

• GitHub

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

Please make sure to update tests as appropriate.