public class TriangleUtilities {
    public static String getRow(int numberOfStars) {
        StringBuilder length = new StringBuilder();

        for (int i = 0; i < numberOfStars; i++){

            length.append('*');
        }

        return length.toString();
    }

    public static String getTriangle(int numberOfRows) {
        StringBuilder length = new StringBuilder();

        for (int i = 1; i <= numberOfRows; i++){
            String triangle = getRow(i);
            length.append(triangle + "\n");
        }
        
        return length.toString();
    }

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

    }

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