当给定弦对的圆心角时，计算弦对圆周上的角度的程序

给定一个圆，它有一个弦和一个由圆心上的弦对的角度。这里的任务是找到圆周上给定弦所对的角度的度量。

例子：

输入： $\( \theta \)$ = 90输出： ABC = 45.00 度输入： $\( \theta \)$ = 65输出： ABC = 32.50 度

方法：

• 设AC为圆心为O的圆的弦，设C为圆周上任意一点。
• 让，角度AOC （在中心）是给定的

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  .

• 所以角度应该在圆周上，
  角 ABC = 角 AOC/2

An angle at the circumference of a circle is the half angle at the centre subtended by the same chord.

下面是上述方法的实现：

C++

// C++ Program to calculate angle
// on the circumference subtended
// by the chord when the central angle
// subtended by the chord is given
#include 
using namespace std;
 
float angleOncirCumference(float z)
{
    return (z / 2);
}
 
// Driver code
int main()
{
 
    // Angle on center
    float angle = 65;
 
    float z = angleOncirCumference(angle);
 
    cout << "The angle is " << (z) << " degrees";
 
    return 0;
}
 
// This code is contributed by jit_t

Java

// Java Program to calculate angle on the circumference
// subtended by the chord when the central angle
// subtended by the chord is given
 
class GFG {
 
    static float angleOncirCumference(float z)
    {
        return (z / 2);
    }
 
    // Driver code
    public static void main(String[] args)
    {
 
        // Angle on center
        float angle = 65;
 
        float z = angleOncirCumference(angle);
 
        System.out.println("The angle is "
                           + z + " degrees");
    }
}

Python3

# Python3 Program to calculate angle
# on the circumference subtended
# by the chord when the central angle
# subtended by the chord is given
def angleOncirCumference(z):
 
    return (z / 2);
 
# Driver code
 
# Angle on center
angle = 65;
 
z = angleOncirCumference(angle);
 
print("The angle is", (z), "degrees");
 
# This code is contributed by Rajput-Ji

C#

// C# Program to calculate angle on the circumference
// subtended by the chord when the central angle
// subtended by the chord is given
using System;
     
public class GFG
{
 
    static float angleOncirCumference(float z)
    {
        return (z / 2);
    }
 
    // Driver code
    public static void Main(String[] args)
    {
 
        // Angle on center
        float angle = 65;
 
        float z = angleOncirCumference(angle);
 
        Console.WriteLine("The angle is "
                        + z + " degrees");
    }
}
 
// This code is contributed by Rajput-Ji

Javascript

 
// JavaScript Program to calculate angle
// on the circumference subtended
// by the chord when the central angle
// subtended by the chord is given
 
function angleOncirCumference(z)
{
    return (z / 2);
}
 
// Driver code
 
    // Angle on center
    let angle = 65;
 
    let z = angleOncirCumference(angle);
 
    document.write("The angle is " + (z) + " degrees");
 
// This code is contributed by Surbhi Tyagi.
 

输出：

The angle is 32.5 degrees

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