public class TriangleUtilities {
    public static String getRow(int numberOfStars) {
        StringBuilder rows = new StringBuilder();
        for(int i=1;i<=numberOfStars;i++){

            rows.append("*");
        }
        return rows.toString();
    }

    public static String getTriangle(int numberOfRows) {
        StringBuilder rows = new StringBuilder();
        for(int i=1;i<=numberOfRows;i++){
            String triangle=getRow(i);
            rows.append(triangle + "\n");

        }
        return rows.toString();
    }

    public static String getSmallTriangle() {
        return getTriangle(4);
    }

    public static String getLargeTriangle() {
        return getTriangle(9);
    }
}