*6.36(幾何：正多邊形的面積)正多邊形是一個n條邊的多邊形，它的每條邊的長度都相等，而且所有角的角度也相等(即多邊形既是等邊又等角的)。計算正多邊形面積的公式是：

使用下面的方法頭編寫方法，返回正多邊形的面積：

public static double area(int n, double side)

編寫一個main方法，提示用戶輸入邊的個數以及正多邊形的邊長，然后顯示它的面積。

下面是一個運行示例：

Enter the number of sides: 5

Enter the side:6.5

The area of the polygon?is 72.690170

*6.36(Geometry: area of a regular polygon) A regular polygon is an n-sided polygon in which all sides are of the same length and all angles have the same degree (i.e., the polygon is both equilateral and equiangular). The formula for computing the area of a regular polygon is

Write a method that returns the area of a regular polygon using the following header:

public static double area(int n, double side)

Write a main method that prompts the user to enter the number of sides and the side of a regular polygon and displays its area.

Here is a sample run:

Enter the number of sides: 5

Enter the side:6.5

The area of the polygon?is 72.690170

下面是參考答案代碼:

// https://cn.fankuiba.com

import java.util.Scanner;

public class Ans6_36_page205 {

public static void main(String[] args) {

Scanner input = new Scanner(System.in);

System.out.print("Enter the side: ");

double side = input.nextDouble();

System.out.print("Enter the number of sides: ");

int n = input.nextInt();

System.out.println("The area of the pentagon is "+area(n,side));

}

public static double area(int n, double side) {

return (n * side * side) / (4 * Math.tan(Math.PI / 5));

}

}

適用Java語言程序設計與數據結構(基礎篇)(原書第11版)Java語言程序設計(基礎篇)(原書第10/11版)更多

總結

以上是生活随笔為你收集整理的求正多边形的面积JAVA_第六章第三十六题(几何：正多边形的面积)(Geometry: area of a regular polygon)...的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。