Chapter VI Question 35 (Geometry: area of a pentagon)
6.35 (Geometry: the area of a pentagon) The area of a pentagon can be calculated using the following formula:
write a method and use the following method header to return the area of the pentagon. public static double area(double side) Write a main method that prompts the user to enter the side of the pentagon, and then displays its area. Here is a running example: Enter the side:5.5 The area of the pentagon is 52.044441 6.35(Geometry: area of a pentagon)The area of a pentagon can be computed using the following formula:
Write a method that returns the area of a pentagon using the following header: public static double area(double side) Write a main method that prompts the user to enter the side of a pentagon and displays its area. Here is a sample run: Enter the side:5.5 The area of the pentagon is 52.044441
Reference Code:
package chapter06;import java.util.Scanner;publicclassCode_35{
publicstaticvoidmain(String[] args){
Scanner inputScanner =newScanner(System.in);
System.out.print("Enter the side: ");double side = inputScanner.nextDouble();double area =area(side);
System.out.printf("The area of the pentagon is %f", area);}publicstaticdoublearea(double side){
double area =(5* Math.pow(side,2))/(4* Math.tan(Math.PI /5));return area;}}
The results show that:
Enter the side:5.5
The area of the pentagon is 52.044441
Process finished with exit code 0