import java.awt.*;

public class Polygons {
    // Some constants to make formulas nicer
    public static final int CENTER = 300;
    public static final int PENTAGON_SIZE = 100;
    public static final int TRIANGLE_SIZE = 250;

    public static void main(String[] args) {
	DrawingPanel p = new DrawingPanel(CENTER * 2, CENTER * 2);
	Graphics g = p.getGraphics();

	// Don't get tripped up by the math here. The important part is:
	// n is the number of points in our shape
	// int[] x = {x1, x2, x3, ... , xn};
	// int[] y = {y1, y2, y3, ... , yn};
	// g.fillPolygon(x, y, n);   <-- for solid shapes
	// or
	// g.drawPolygon(x, y, n);   <-- for outlined shapes

	// Draws a Triangle
	int sin = (int)(Math.sin(Math.PI * 2 / 3) * TRIANGLE_SIZE);
	int cos = (int)(Math.cos(Math.PI * 2 / 3) * TRIANGLE_SIZE);
	int[] triangleX = {
	    CENTER - sin,
	    CENTER,
	    CENTER + sin
	};
	int[] triangleY = {
	    CENTER + cos,
	    CENTER + TRIANGLE_SIZE,
	    CENTER + cos
	};
	g.drawPolygon(triangleX, triangleY, 3);

	// Draws a Pentagon
	int s1 = (int)(1.0 / 4 * Math.sqrt(10 + 2 * Math.sqrt(5)) * PENTAGON_SIZE);
	int s2 = (int)(1.0 / 4 * Math.sqrt(10 - 2 * Math.sqrt(5)) * PENTAGON_SIZE);
	int c1 = (int)(1.0 / 4 * (Math.sqrt(5) - 1) * PENTAGON_SIZE);
	int c2 = (int)(1.0 / 4 * (Math.sqrt(5) + 1) * PENTAGON_SIZE);
	int[] pentagonX = {
	    CENTER,
	    CENTER + s1,
	    CENTER + s2,
	    CENTER - s2,
	    CENTER - s1
	};
	int[] pentagonY = {
	    CENTER - PENTAGON_SIZE,
	    CENTER - c1,
	    CENTER + c2,
	    CENTER + c2,
	    CENTER - c1
	};
	g.fillPolygon(pentagonX, pentagonY, 5);
    }
}