public class TriangleUtilities {
    public static String getRow(int numberOfStars) {
        StringBuilder builder = new StringBuilder();
        for (int i = 1 ; i<= numberOfStars; i++){
            builder.append('*');

        }
        return builder.toString();

    }

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

        }
        return builder.toString();

    }


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

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