**Contents**show

## How do you find the area and perimeter of a circle in Java?

**CalculateCircleArea(r)** to calculate area of circle and return its value. CalculateCircleCircumference(r) to calculate circumference (perimeter) of circle.

## How do you calculate perimeter in Java?

**JAVA**

- public class Main.
- {
- public static void main (String args[])
- { float a ,b, c, d, perimeter;
- a=c= 5;
- b=d=4;
- perimeter = 2*(a+b);
- System.out.println(“Perimeter of Rectangle is: “+perimeter);

## What is the perimeter formula?

Perimeter, Area, and Volume

Table 1 . Perimeter Formulas | ||
---|---|---|

Shape | Formula | Variables |

Square | P=4s |
s is the length of the side of the square. |

Rectangle | P=2L+2W | L and W are the lengths of the rectangle’s sides (length and width). |

Triangle | a+b+c | a,b , and c are the side lengths. |

## What is parameter in Java?

A parameter is **a value that you can pass to a method in Java**. Then the method can use the parameter as though it were a local variable initialized with the value of the variable passed to it by the calling method.

## How do you find the radius?

**Let us use these formulas to find the radius of a circle.**

- When the diameter is known, the formula for the radius of a circle is: Radius = Diameter / 2.
- When the circumference is known, the formula for the radius is: Radius = Circumference / 2π

## What is the algorithm for finding the 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.

## What is the algorithm for circumference?

Circumference of a circle can simply be evaluated using following formula. **Circumference = 2*pi*r** where r is the radius of circle and value of pi = 3.1415.