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this.side = side;
}

public double getSide() {
return side;
}

public void setSide(double side) {
this.side = side;
}

@Override
public double getArea() {
return side * side;
}

@Override
public double getPerimeter() {
return 4 * side;
}

@Override
public int getNumberOfVertex() {
return 4;
}

@Override
public void shapeInfo() {
System.out.println("This is a shape 'Square':");
super.shapeInfo();
System.out.println("\tside = " + side);
}
}

/**
* Created by Mykola Demchyna on 24.03.2018.
*/

public class Circle extends Shape implements IPerimeter {

private double radius;

public Circle(double radius, String color, Border borderStyle) {
super(color, borderStyle);
this.radius = radius;
}

public double getRadius() {
return radius;
}

public void setRadius(double radius) {
this.radius = radius;
}

@Override
public double getArea() {
return Shape.PI * radius * radius;
}

@Override
public double getPerimeter() {
return 2 * Shape.PI * radius;
}

@Override

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