diff --git a/challenge.py b/challenge.py
index ffdfcce..68bf5a1 100644
--- a/challenge.py
+++ b/challenge.py
@@ -1,54 +1,81 @@
 import math
 
+ERROR_MESSAGE = "I can't calculate this area, please verify your data.\n\t    I only accept positive numbers."
+
 
 def square_area(side):
     """Returns the area of a square"""
-    # You have to code here
-    # REMEMBER: Tests first!!!
-    pass
+    side = float(side)
+
+    if side > 0.0:
+        return side**2
+    else:
+        raise ValueError(ERROR_MESSAGE)
 
 
 def rectangle_area(base, height):
     """Returns the area of a rectangle"""
-    # You have to code here
-    # REMEMBER: Tests first!!!
-    pass
+    base = float(base)
+    height = float(height)
+
+    if base > 0.0 and height > 0.0:
+        return base * height
+    else:
+        raise ValueError(ERROR_MESSAGE)
 
 
 def triangle_area(base, height):
     """Returns the area of a triangle"""
-    # You have to code here
-    # REMEMBER: Tests first!!!
-    pass
+    base = float(base)
+    height = float(height)
+
+    if base > 0.0 and height > 0.0:
+        return (base * height) / 2
+    else:
+        raise ValueError(ERROR_MESSAGE)
 
 
 def rhombus_area(diagonal_1, diagonal_2):
     """Returns the area of a rhombus"""
-    # You have to code here
-    # REMEMBER: Tests first!!!
-    pass
+    diagonal_1 = float(diagonal_1)
+    diagonal_2 = float(diagonal_2)
+
+    if diagonal_1 > 0.0 and diagonal_2 > 0.0:
+        return (diagonal_1 * diagonal_2) / 2
+    else:
+        raise ValueError(ERROR_MESSAGE)
 
 
 def trapezoid_area(base_minor, base_major, height):
     """Returns the area of a trapezoid"""
-    # You have to code here
-    # REMEMBER: Tests first!!!
-    pass
+    base_minor = float(base_minor)
+    base_major = float(base_major)
+
+    if base_major > 0.0 and base_minor > 0.0:
+        return ((base_minor + base_major) / 2) * height
+    else:
+        raise ValueError(ERROR_MESSAGE)
 
 
 def regular_polygon_area(perimeter, apothem):
     """Returns the area of a regular polygon"""
-    # You have to code here
-    # REMEMBER: Tests first!!!
-    pass
+    perimeter = float(perimeter)
+    apothem = float(apothem)
+
+    if perimeter > 0.0 and apothem > 0.0:
+        return (perimeter * apothem) / 2
+    else:
+        raise ValueError(ERROR_MESSAGE)
 
 
 def circumference_area(radius):
     """Returns the area of a circumference"""
-    # You have to code here
-    # REMEMBER: Tests first!!!
-    # Use math.pi for π value
-    pass
+    radius = float(radius)
+
+    if radius > 0.0:
+        return round(math.pi * (radius ** 2), 2)
+    else:
+        raise ValueError(ERROR_MESSAGE)
 
 
 if __name__ == '__main__':
@@ -57,32 +84,52 @@ def circumference_area(radius):
     class GeometrySuite(unittest.TestCase):
 
         def setUp(self):
-            # Initialize the needed values for the tests
-            pass
+            self.values = {
+                'side': 4,
+                'base': 10,
+                'height': 10,
+                'diagonal_1': 10,
+                'diagonal_2': 10,
+                'base_minor': 10,
+                'base_major': 10,
+                'perimeter': 10,
+                'apothem': 10,
+                'radius': 1,
+            }
 
         def test_square_area(self):
-            # Make this test first...
+            self.assertEqual(16.0, square_area(self.values['side']))
 
         def test_rectangle_area(self):
-            # Make this test first...
+            self.assertEqual(100, rectangle_area(self.values['base'],
+                                                 self.values['height']
+                                                 ))
 
         def test_triangle_area(self):
-            # Make this test first...
+            self.assertEqual(50, triangle_area(self.values['base'],
+                                               self.values['height']
+                                               ))
 
         def test_rhombus_area(self):
-            # Make this test first...
+            self.assertEqual(50, rhombus_area(self.values['diagonal_1'],
+                                              self.values['diagonal_2']
+                                              ))
 
         def test_trapezoid_area(self):
-            # Make this test first...
+            self.assertEqual(100, trapezoid_area(self.values['base_minor'],
+                                                 self.values['base_major'],
+                                                 self.values['height']
+                                                 ))
 
         def test_regular_polygon_area(self):
-            # Make this test first...
+            self.assertEqual(50, regular_polygon_area(self.values['perimeter'],
+                                                      self.values['apothem']
+                                                      ))
 
         def test_circumference_area(self):
-            # Make this test first...
+            self.assertEqual(3.14, circumference_area(self.values['radius']))
 
         def tearDown(self):
-            # Delete the needed values for the tests
-            pass
+            del self.values
 
     unittest.main()