Updated TriangleUtilities methods

TriangleUtilities.java

     }
     
     public static String getTriangle(int numberOfRows) {
-        // numberOfRows -1 for each row 
-        // for loop for # of rows, decreasing by 1
-        return 
+        StringBuilder stars = new StringBuilder();
+        
+        for (int i = 1; i <= numberOfRows; i++) {
+            for (int j = i; j > 0; j--) {
+                stars.append("*");
+            }
+            stars.append("\n");
+        }
+        
+        String starTriangle = stars.toString();
+        return starTriangle;
+        
     }
 
 
     public static String getSmallTriangle() {
-        return null;
-    }
+        StringBuilder stars = new StringBuilder();
+        
+        for (int i = 1; i < 5; i++) {
+            for (int j = i; j > 0; j--) {
+                stars.append("*");
+            }
+            stars.append("\n");
+        }
+        
+        String starTriangle = stars.toString();
+        return starTriangle;
+
+        }
 
     public static String getLargeTriangle() {
-        return null;
+        StringBuilder stars = new StringBuilder();
+        
+        for (int i = 1; i < 10 ; i++) {
+            for (int j = i; j > 0; j--) {
+                stars.append("*");
+            }
+            stars.append("\n");
+        }
+        
+        String starTriangle = stars.toString();
+        return starTriangle;
+
     }
 }