计算风筝面积的程序

风筝有点像菱形，但在风筝中，相邻的边相等，对角线通常不相等。

方法一：当两条对角线都给定时

如果给定风筝的对角线d1和d2 ，则风筝的面积是两条对角线乘积的一半，即

$\ Area = \frac{ d1 * d2 } {2} \$

例子：

Input: d1 = 4, d2 = 6
Output: Area of Kite  = 12

Input: d1 = 5, d2 = 7
Output: Area of Kite  = 17.5

方法：在这种方法中，我们简单地使用上面的公式。
下面是上述方法的实现：

C++

// C++ implementation of the approach
  
#include 
using namespace std;
  
// Function to return the area of kite
float areaOfKite(int d1, int d2)
{
    // use above formula
    float area = (d1 * d2) / 2;
    return area;
}
  
// Driver code
int main()
{
    int d1 = 4, d2 = 6;
    cout << "Area of Kite = "
         << areaOfKite(d1, d2);
  
    return 0;
}

Java

// Java implementation of the approach
class GFG 
{
  
    // Function to return the area of kite
    static float areaOfKite(int d1, int d2)
    {
        // Use above formula
        float area = (d1 * d2) / 2;
        return area;
    }
  
    // Driver code
    public static void main(String[] args)
    {
        int d1 = 4, d2 = 6;
        System.out.println("Area of Kite = "
                + areaOfKite(d1, d2));
    }
}
  
// This code is contributed by Rajput-Ji

Python3

# Python implementation of the approach
  
# Function to return the area of kite
def areaOfKite(d1, d2):
  
    # use above formula
    area = (d1 * d2) / 2;
    return area;
  
# Driver code
d1 = 4;
d2 = 6;
print("Area of Kite = ",
    areaOfKite(d1, d2));
  
# This code is contributed by Rajput-Ji

C#

// C# implementation of the approach
using System;
  
class GFG 
{
  
// Function to return the area of kite
static float areaOfKite(int d1, int d2)
{
    // Use above formula
    float area = (d1 * d2) / 2;
    return area;
}
  
// Driver code
public static void Main()
{
    int d1 = 4, d2 = 6;
    Console.WriteLine("Area of Kite = "
            + areaOfKite(d1, d2));
}
}
  
// This code is contributed by anuj_67..

Javascript

  
// Javascript implementation of the approach
  
// Function to return the area of kite
function areaOfKite(d1, d2)
{
    // use above formula
    var area = (d1 * d2) / 2;
    return area;
}
  
// Driver code
var d1 = 4, d2 = 6;
document.write("Area of Kite = "
    + areaOfKite(d1, d2));
  

输出：

Area of Kite = 12

方法二：当给定边a、b和角度时：

当风筝a和b的不等边和它们之间的夹角θ给定时，则

$\ Area = a*b*sin\theta \$

例子：

Input: a = 4, b = 7, θ = 78
Output: Area of Kite  = 27.3881

Input: a = 6, b = 9, θ = 83
Output: Area of Kite  = 53.5975

方法：在这种方法中，我们简单地使用上面的公式。
下面是上述方法的实现：

C++

// C++ implementation of the approach
  
#include 
#define PI 3.14159 / 180
using namespace std;
  
// Function to return the area of the kite
float areaOfKite(int a, int b, double angle)
{
    // convert angle degree to radians
    angle = angle * PI;
    // use above formula
  
    double area = a * b * sin(angle);
    return area;
}
  
// Driver code
int main()
{
    int a = 4, b = 7, angle = 78;
    cout << "Area of Kite = "
         << areaOfKite(a, b, angle);
  
    return 0;
}

Java

// Java implementation of the approach
import java.io.*;
  
class GFG
{
      
static double PI = (3.14159 / 180);
  
// Function to return the area of the kite
static float areaOfKite(int a, int b, double angle)
{
    // convert angle degree to radians
    angle = angle * PI;
      
    // use above formula
    double area = a * b * Math.sin(angle);
    return (float)area;
}
  
// Driver code
public static void main (String[] args)
{
  
    int a = 4, b = 7, angle = 78;
    System.out.println ("Area of Kite = " + areaOfKite(a, b, angle));
}
}
  
// This code is contributed by jit_t.

蟒蛇3

# Python implementation of the approach
import math
PI = 3.14159 / 180;
  
# Function to return the area of the kite
def areaOfKite(a, b, angle):
      
    # convert angle degree to radians
    angle = angle * PI;
      
    # use above formula
  
    area = a * b * math.sin(angle);
    return area;
  
# Driver code
a = 4; b = 7; angle = 78;
print("Area of Kite = ",
        areaOfKite(a, b, angle));
  
# This code contributed by PrinciRaj1992

C＃

// C# implementation of the approach
using System;
  
class GFG
{
    static double PI = (3.14159 / 180);
  
// Function to return the area of the kite
static float areaOfKite(int a, int b, double angle)
{
    // convert angle degree to radians
    angle = angle * PI;
      
    // use above formula
    double area = a * b * Math.Sin(angle);
    return (float)area;
}
  
// Driver code
static public void Main ()
{
    int a = 4, b = 7, angle = 78;
    Console.WriteLine("Area of Kite = " + areaOfKite(a, b, angle));
}
}
  
// This code is contributed by ajit

Javascript

// Javascript implementation of the approach
var PI = 3.14159 / 180
  
// Function to return the area of the kite
function areaOfKite(a, b, angle)
{
  
    // convert angle degree to radians
    angle = angle * PI;
    // use above formula
  
    var area = a * b * Math.sin(angle);
    return area.toFixed(4);
}
  
// Driver code
var a = 4, b = 7, angle = 78;
document.write( "Area of Kite = "
     + areaOfKite(a, b, angle));
  
// This code is contributed by rutvik_56.

输出：

Area of Kite = 27.3881

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