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The formula for calculating area of a circle is, Area = PI * r * r, where PI is a constant and r is the radius of the circle.

## What is area of a circle?

The area of a circle is pi times the radius squared (A = π r²). Learn how to use this formula to find the area of a circle when given the diameter.

## How do you code a circle in Java?

“how to create a circle in java” Code Answer

- import java. util. Scanner;
- public class AreaOfCircle {
- public static void main(String args[]){
- int radius;
- double area;
- Scanner sc = new Scanner(System. in);
- System. out. println(“Enter the radius of the circle ::”);
- radius = sc. nextInt();

## What is circle in Java?

Circle class is a part of the JavaFX library. Circle class creates a circle with a specified x and y position for the center of the circle, the specified radius for the circle and a specified fill. The radius and the center of the circles are measured in pixels.

## What is a circle diameter?

The diameter is the length of the line through the center that touches two points on the edge of the circle.

## What is the formula for circles?

We know that the general equation for a circle is ( x – h )^2 + ( y – k )^2 = r^2, where ( h, k ) is the center and r is the radius.

## How do you draw a circle in Java applet?

Example:

- import java. awt.*;
- import java. applet.*;
- public class circle extends Applet.
- {
- public void paint(Graphics g)
- {
- g. drawOval(20,20,200,120);
- g. setColor(Color. green);

## Which method is used to draw a circle in Java?

drawOval() is method use to draw a circle in java.

## How do you find the diameter in Java?

Logic to find diameter, circumference and area of circle

Apply the formulas to calculate diameter, circumference and area. Use diameter = 2 * radius, circumference = 2 * 3.14 * radius and area = 3.14 * radius * radius. Print all resultant value diameter, circumference and area.

## How do you find the area of Square in Java?

Java Program

- public class shpere{
- public static void main(String args[])
- {
- int s=13;
- int area_square=s*s;
- System.out.println(“Area of the square=”+area_square);
- }
- }

## How do you make a circle in FX Java?

Follow the steps given below to draw a Circle in JavaFX.

- Step 1: Creating a Class. …
- Step 2: Creating a Circle. …
- Step 3: Setting Properties to the Circle. …
- Step 4: Creating a Group Object. …
- Step 5: Creating a Scene Object. …
- Step 6: Setting the Title of the Stage. …
- Step 7: Adding Scene to the Stage.

## How do I measure a circle?

The circumference of a circle can be calculated using either of the following formulas: C= d or C=2 r. We know that the diameter of the circle is 8 cm, and an approximation for pi is 3.14, so we can plug these values into the formula C= d. The formula becomes C=(3.14)(8), which simplifies to 25.12.

## How do you find area?

Area is calculated by multiplying the length of a shape by its width. In this case, we could work out the area of this rectangle even if it wasn’t on squared paper, just by working out 5cm x 5cm = 25cm² (the shape is not drawn to scale).

## What are the different parts of a circle?

Important Circle Parts

- Radius: The distance from the center of the circle to its outer rim.
- Chord: A line segment whose endpoints are on a circle.
- Diameter: A chord that passes through the center of the circle. …
- Secant: A line that intersects a circle in two points.