diff --git a/BoundingBox.cs b/BoundingBox.cs
index 01088e1..9d2f037 100644
--- a/BoundingBox.cs
+++ b/BoundingBox.cs
@@ -6,13 +6,19 @@ namespace BoundingBox
 
     public class BoundingBox2
     {
+        /// <summary>
+        /// Vector containing the lowest X and Y coordinates contained in the bounding box.
+        /// </summary>
         public Vector2 Min;
 
+        /// <summary>
+        /// Vector containing the highest X and Y coordinates contained in the bounding box.
+        /// </summary>
         public Vector2 Max;
 
-        public Vector2 Center => ;
+        public Vector2 Center => (Max + Min) * 0.5f;
 
-        public Vector2 Size =>;
+        public Vector2 Size => Max - Min;
 
         public BoundingBox2(Vector2 min, Vector2 max)
         {
@@ -22,21 +28,34 @@ namespace BoundingBox
 
         public bool Contains(Vector2 position)
         {
-
+            return Min.X <= position.X && position.X <= Max.X && Min.Y <= position.Y && position.Y <= Max.Y;
         }
 
         public IntersectionType Intersects(BoundingBox2 other)
         {
+            if (Min.X <= other.Min.X && other.Max.X <= Max.X && Min.Y <= other.Min.Y && other.Max.Y <= Max.Y)
+            {
+                return IntersectionType.Contains;
+            }
+            if ((other.Max.X <= Min.X || Max.X <= other.Min.X) && (other.Max.Y <= Min.Y || Max.Y <= other.Min.Y))
+            {
+                return IntersectionType.Disjoint;
+            }
+            return IntersectionType.Intersects;
         }
 
         public void Translate(Vector2 translation)
         {
-
+            Min += translation;
+            Max += translation;
         }
 
         public void Expand(float expansion)
         {
-
+            Min.X -= expansion;
+            Min.Y -= expansion;
+            Max.X += expansion;
+            Max.Y += expansion;
         }
     }
 }