Question

How to calculate the perimeter and the area of scalene triangle in C#

Answer 1

using System;

namespace ConsoleApplication_C_Sharp
{
    class Program
    {
        static void Main(string[] args)
        {
            int a_base = 3, b_left_side = 4, c_right_side = 5;

            float perimeter = a_base + b_left_side + c_right_side;
            Console.WriteLine("Perimeter = {0:F2}", perimeter);

            float semi_perimeter = (a_base + b_left_side + c_right_side) / 2;
            double area_triangle1 = Math.Sqrt(semi_perimeter * (semi_perimeter - a_base) *
                                                               (semi_perimeter - b_left_side) *
                                                               (semi_perimeter - c_right_side));
            Console.WriteLine("Area triangle1 = {0:F2}", area_triangle1);

            int b_base = 4, a_right_side = 6, angle_ab = 55;
            double area_triangle2 = (a_right_side * b_base *
                                                     Math.Sin((Math.PI / 180) *
                                                     angle_ab)) / 2;
            Console.WriteLine("Area triangle2 = {0:F2}", area_triangle2);

            int height = 5;
            b_base = 8;
            double area_triangle3 = (b_base * height) / 2;
            Console.WriteLine("Area triangle3 = {0:F2}", area_triangle3);
        }
    }
}

/*
run:
      
Perimeter = 12.00
Area triangle1 = 6.00
Area triangle2 = 9.83
Area triangle3 = 20.00
     
*/

 

70+ SQL courses for beginners and professionals