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Gnesinka [82]
3 years ago
15

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:
Area = (n * s²) / (4 * tan(π/n))
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.
Computers and Technology
1 answer:
butalik [34]3 years ago
4 0

import java.util.Scanner;

public class polygon {

/** Main Method */

public static void main(String[] args) {

 Scanner input = new Scanner(System.in); // Create a Scanner

 // Prompt the user to enter the number of sides  

 // and the side of a regular polygon

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

 int n = input.nextInt();

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

 double side = input.nextDouble();

 // Display the area of the regular polygon

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

}

/** Method area computes and returns the area of a regular polygon */

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

 return (n * Math.pow(side, 2) / (4 * Math.tan(Math.PI / n)));

}

}

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7 0
3 years ago
Climatologist use weather balloons, stethoscopes, and satellites true or false
Nonamiya [84]

Answer:

False.

Explanation:

A stethoscope is a medical instrument which is used for listening to the work of the heart and lungs.  It consists of a microphone that rests on the patient's chest, and rubber tubes that bring the sound to the earphones. An ordinary stethoscope does not have any moving or electrical parts, as it only mechanically conducts sound from the patient's chest to the doctor's ear.   One of the simplest examinations that doctors perform today is listening to the lungs and heart with a stethoscope. With the help of this instrument, noises are heard during the work of the lungs and heart.

8 0
3 years ago
When recording data on a multiple-disk storage system, should we fill a complete disk surface before starting on another surface
Cerrena [4.2K]

The user needs to complete the entire disk surface first before starting another surface.

Explanation:

When you are using a multiple disk storage system to write the data the disk automatically writes the disk based on the algorithm for better efficiency and availability of the disk space.

hence when you are recording a data on a multiple disk storage system, it is recommended to fill the complete disk surface initially before you start the another surface to record the data.

4 0
3 years ago
What keyboard command opens the Go To dialog box?
Harlamova29_29 [7]

If you mean the search for a phrase or word function on a page,

Left Ctrl + F

7 0
3 years ago
Read 2 more answers
Taking a suitable example in c language explain the of call by value and call by reference concepts.
Degger [83]

Answer: The difference between call by value and call by reference is that in call by value the actual parameters are passed into the function as arguments whereas in call by reference the address of the variables are sent as parameters.

Explanation:

Some examples are:

call by value

#include <stdio.h>  

void swap(int, int);

int main()

{  int a = 10, b= 20;

 swap(a, b);

 printf("a: %d, b: %d\n", a, b);

}  

void swap(int c, int d)

{

 int t;

 t = c; c = d; d = t;

}  

OUTPUT

a: 10, b: 20

The value of a and b remain unchanged as the values are local

//call by reference

#include <stdio.h>

 void swap(int*, int*);

 int main()

{

 int a = 10, b = 20;

 swap(&a, &b);   //passing the address

 printf("a: %d, b: %d\n", a, b);

}

void swap(int *c, int *d)

{

 int t;

 t = *c; *c = *d; *d = t;

}

OUTPUT

a: 20, b: 10

due to dereferencing by the pointer the value  can be changed which is call by reference

8 0
3 years ago
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