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"use strict"

let sideOfTriangleA = 5;

let sideOfTriangleB = 6;

let sideOfTriangleC = 9;

let perimeterOfTriangle=sideOfTriangleA+sideOfTriangleB+sideOfTriangleC;

let halfPerimeterOfTriangle=perimeterOfTriangle / 2;

let squareOfTriangle = ( halfPerimeterOfTriangle * ( halfPerimeterOfTriangle - sideOfTriangleA ) * ( halfPerimeterOfTriangle - sideOfTriangleB ) * ( halfPerimeterOfTriangle - sideOfTriangleC ) ) ** ( 1 / 2 ); //Search Square of triangle by the Herons formula

squareOfTriangle=squareOfTriangle.toFixed(2); //Rounding to the hundredth

console.log("Perimeter of triangle: "+ perimeterOfTriangle)

console.log("Square of triandle: " + squareOfTriangle)