Answer:
Here is the code in c++.
//include headers
#include <bits/stdc++.h>
using namespace std;
//main function
int main() {
//variables to store coordinates
float x1,x2,y1,y2,x3,y3;
cout<<"Please Enter the coordinate of first point (x1,y1): ";
// reading coordinate of first point
cin>>x1>>y1;
cout<<"Please Enter the coordinate of second point (x2,y2): ";
// reading coordinate of second point
cin>>x2>>y2;
cout<<"Please Enter the coordinate of third point (x3,y3): ";
// reading coordinate of third point
cin>>x3>>y3;
//calculating area of the triangle
float area=abs((x1*(y2-y3)+x2*(y3-y1)+x3*(y1-y2))/2);
cout<<"area of the triangle:"<<area<<endl;
return 0;
}
Explanation:
Declare four variables x1,x2,x3,y1,y2,y3 to store the coordinate of all three
points of circle.Read the coordinate of all the point from user.Calculate area of triangle with the help of mentioned formula area=abs((x1*(y2-y3)+x2*(y3-y1)+x3*(y1-y2))/2). Then print the area of the triangle.
Output:
Please Enter the coordinate of first point (x1,y1): 11 17
Please Enter the coordinate of second point (x2,y2): 23 30
Please Enter the coordinate of third point (x3,y3): 43 18
area of the triangle:202
