Question

write a program to find the area of triangle using function statement​

Answer 1

Answer:

Area = sqrt(s*(s-a)*(s-b)*(s-c))

where a, b and c are lengths of sides of

triangle and s = (a+b+c)/2

Program to find area of a triangle

Explanation:

// C++ program to evaluate area of a polygon using

// shoelace formula

#include <bits/stdc++.h>

using namespace std;

// (X[i], Y[i]) are coordinates of i'th point.

double polygonArea(double X[], double Y[], int n)

{

// Initialize area

double area = 0.0;

// Calculate value of shoelace formula

int j = n - 1;

for (int i = 0; i < n; i++)

{

area += (X[j] + X[i]) * (Y[j] - Y[i]);

j = i; // j is previous vertex to i

}

// Return absolute value

return abs(area / 2.0);

}

// Driver program to test above function

int main()

{

double X[] = {0, 2, 4};

double Y[] = {1, 3, 7};

int n = sizeof(X)/sizeof(X[0]);

cout << polygonArea(X, Y, n);

}

this is for c++

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