added solution according to README.md

src/main/java/core/basesyntax/AreaCalculator.java

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+package core.basesyntax;
+
+public interface AreaCalculator {
+    double getArea();
+}

src/main/java/core/basesyntax/Circle.java

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+package core.basesyntax;
+
+public class Circle extends Figure {
+    private double radius;
+
+    public Circle(Color color, double radius) {
+        super(color);
+        this.radius = radius;
+    }
+
+    @Override
+    public double getArea() {
+        return Math.PI * (radius * radius);
+    }
+
+    @Override
+    public void draw() {
+        System.out.println("Figure: circle, area: " + getArea() + " sq.units, "
+                + "radius: " + radius + " units, "
+                + "color: " + getColor());
+    }
+}

src/main/java/core/basesyntax/Color.java

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+package core.basesyntax;
+
+public enum Color {
+    WHITE,
+    BLACK,
+    PURPLE,
+    ORANGE,
+    GREEN,
+    BROWN,
+    BLUE,
+    YELLOW
+}

src/main/java/core/basesyntax/ColorSupplier.java

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+package core.basesyntax;
+
+import java.util.Random;
+
+public class ColorSupplier {
+    private Random random = new Random();
+
+    public Color getRandomColor() {
+        int index = random.nextInt(Color.values().length);
+        return Color.values()[index];
+    }
+}

src/main/java/core/basesyntax/Drawable.java

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+package core.basesyntax;
+
+public interface Drawable {
+    void draw();
+}

src/main/java/core/basesyntax/Figure.java

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+package core.basesyntax;
+
+public abstract class Figure implements Drawable, AreaCalculator {
+    private Color color;
+
+    public Figure(Color color) {
+        this.color = color;
+    }
+
+    public String getColor() {
+        return color.name().toLowerCase();
+    }
+}

src/main/java/core/basesyntax/FigureSupplier.java

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+package core.basesyntax;
+
+import java.util.Random;
+
+public class FigureSupplier {
+    private static final int MAX_FIGURE_NUMBER = 5;
+    private static final int MAX_VALUE = 100;
+    private static final int MIN_VALUE = 1;
+    private static final double DEFAULT_RADIUS = 10;
+
+    private Random random = new Random();
+    private ColorSupplier supplier = new ColorSupplier();
+
+    public Figure getRandomFigure() {
+        int randomFigureNumber = random.nextInt(MAX_FIGURE_NUMBER);
+        Color randomColor = supplier.getRandomColor();
+
+        switch (randomFigureNumber) {
+            case 0:
+                return new Circle(randomColor,
+                        getRandomNumber());
+            case 1:
+                return new IsoscelesTrapezoid(randomColor,
+                        getRandomNumber(), getRandomNumber(), getRandomNumber());
+            case 2:
+                return new Rectangle(randomColor,
+                        getRandomNumber(), getRandomNumber());
+            case 3:
+                return new RightTriangle(randomColor,
+                        getRandomNumber(), getRandomNumber());
+            case 4:
+                return new Square(randomColor,
+                        getRandomNumber());
+            default:
+                return getDefaultFigure();
+        }
+    }
+
+    public Figure getDefaultFigure() {
+        return new Circle(Color.WHITE, DEFAULT_RADIUS);
+    }
+
+    private int getRandomNumber() {
+        return random.nextInt(MAX_VALUE) + MIN_VALUE;
+    }
+}

src/main/java/core/basesyntax/IsoscelesTrapezoid.java

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+package core.basesyntax;
+
+public class IsoscelesTrapezoid extends Figure {
+    private double topParallelSide;
+    private double bottomParallelSide;
+    private double side;
+
+    public IsoscelesTrapezoid(
+            Color color, double topParallelSide,
+            double bottomParallelSide, double side) {
+        super(color);
+        if (topParallelSide < bottomParallelSide) {
+            this.topParallelSide = topParallelSide;
+            this.bottomParallelSide = bottomParallelSide;
+        } else {
+            this.topParallelSide = bottomParallelSide;
+            this.bottomParallelSide = topParallelSide;
+        }
+        this.side = side;
+    }
+
+    @Override
+    public double getArea() {
+        return ((topParallelSide + bottomParallelSide) / 2)
+                * (Math.sqrt(side * side
+                - Math.pow((bottomParallelSide - topParallelSide) / 2, 2)));
+    }
+
+    @Override
+    public void draw() {
+        System.out.println("Figure: isosceles trapezoid, area: " + getArea() + " sq.units, "
+                + "topParallelSide: " + topParallelSide + " units, "
+                + "bottomParallelSide: " + bottomParallelSide + " units, "
+                + "side: " + side + " units, "
+                + "color: " + getColor());
+    }
+}

src/main/java/core/basesyntax/Main.java

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+package core.basesyntax;
+
+public class Main {
+    private static final int SIZE = 6;
+
+    public static void main(String[] args) {
+        Figure[] figures = new Figure[SIZE];
+        FigureSupplier supplier = new FigureSupplier();
+
+        for (int i = 0; i < SIZE; i++) {
+            if (SIZE / 2 > i) {
+                figures[i] = supplier.getRandomFigure();
+            } else {
+                figures[i] = supplier.getDefaultFigure();
+            }
+            figures[i].draw();
+        }
+    }
+}

src/main/java/core/basesyntax/Rectangle.java

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+package core.basesyntax;
+
+public class Rectangle extends Figure {
+    private double height;
+    private double width;
+
+    public Rectangle(Color color, double width, double height) {
+        super(color);
+        this.width = width;
+        this.height = height;
+    }
+
+    @Override
+    public double getArea() {
+        return height * width;
+    }
+
+    @Override
+    public void draw() {
+        System.out.println("Figure: rectangle, area: " + getArea() + " sq.units, "
+                + "height: " + height + " units, width: " + width + " units, "
+                + "color: " + getColor());
+    }
+}

src/main/java/core/basesyntax/RightTriangle.java

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+package core.basesyntax;
+
+public class RightTriangle extends Figure {
+    private double firstLeg;
+    private double secondLeg;
+
+    public RightTriangle(Color color, double firstLeg, double secondLeg) {
+        super(color);
+        this.firstLeg = firstLeg;
+        this.secondLeg = secondLeg;
+    }
+
+    @Override
+    public double getArea() {
+        return (firstLeg * secondLeg) / 2;
+    }
+
+    @Override
+    public void draw() {
+        System.out.println("Figure: right triangle, area: " + getArea() + " sq.units, "
+                + "firstLeg: " + firstLeg + " units, secondLeg: " + secondLeg + " units, "
+                + "color: " + getColor());
+    }
+}

src/main/java/core/basesyntax/Square.java

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+package core.basesyntax;
+
+public class Square extends Figure {
+    private double side;
+
+    public Square(Color color, double side) {
+        super(color);
+        this.side = side;
+    }
+
+    @Override
+    public double getArea() {
+        return side * side;
+    }
+
+    @Override
+    public void draw() {
+        System.out.println("Figure: square, area: " + getArea() + " sq.units, "
+                + "side: " + side + " units, "
+                + "color: " + getColor());
+    }
+}