area of a triangle with angle code example

Example 1: area of a right angle triangle

#include <stdio.h>
int main(){
    float h, b, A;
    printf("What is the Height and base of the triangle: \n");
    scanf("%f %f", &h, &b);
    A = 0.5 * b *h;
    printf("Area is %f\n", A);
}

Example 2: area of triangle

import java.util.Scanner;

public class shw2point15 {

    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);

        System.out.println("Enter three points for a triangle:");

        double x1 = input.nextDouble();
        double y1 = input.nextDouble();
        double x2 = input.nextDouble();
        double y2 = input.nextDouble();
        double x3 = input.nextDouble();
        double y3 = input.nextDouble();


        double s = ((x1 + y1) + (x2 + y2) + (x3 + y3)) / 2;
        double area = Math.sqrt(s * (s - (x1 - y1)) * (s - (x2 - y2)) * (s - (x3 - y3)));



        System.out.println("The area of the triangle is " + area);
    }
}