diff --git a/src/core/graphics/Graphics.js b/src/core/graphics/Graphics.js
index f762ed3..b8ba208 100644
--- a/src/core/graphics/Graphics.js
+++ b/src/core/graphics/Graphics.js
@@ -974,8 +974,8 @@
                             theta = (x2 - x) / (y2 - y);
                         }
 
-                        rw = ((h * Math.sin(theta)) + (w * Math.cos(theta))) / 2;
-                        rh = ((w * Math.sin(theta)) + (h * Math.cos(theta))) / 2;
+                        rw = Math.abs((h * Math.sin(theta)) + (w * Math.cos(theta))) / 2;
+                        rh = Math.abs((w * Math.sin(theta)) + (h * Math.cos(theta))) / 2;
                         cx = (x2 + x) / 2;
                         cy = (y2 + y) / 2;
 

diff --git a/src/core/graphics/Graphics.js b/src/core/graphics/Graphics.js
index f762ed3..b8ba208 100644
--- a/src/core/graphics/Graphics.js
+++ b/src/core/graphics/Graphics.js
@@ -974,8 +974,8 @@
                             theta = (x2 - x) / (y2 - y);
                         }
 
-                        rw = ((h * Math.sin(theta)) + (w * Math.cos(theta))) / 2;
-                        rh = ((w * Math.sin(theta)) + (h * Math.cos(theta))) / 2;
+                        rw = Math.abs((h * Math.sin(theta)) + (w * Math.cos(theta))) / 2;
+                        rh = Math.abs((w * Math.sin(theta)) + (h * Math.cos(theta))) / 2;
                         cx = (x2 + x) / 2;
                         cy = (y2 + y) / 2;
 
diff --git a/test/core/Graphics.js b/test/core/Graphics.js
index e868daa..020ecaf 100644
--- a/test/core/Graphics.js
+++ b/test/core/Graphics.js
@@ -93,14 +93,14 @@
             const graphics = new PIXI.Graphics();
 
             graphics.lineStyle(20, 0, 0.5);
-            graphics.moveTo(10, 10);
-            graphics.lineTo(50, 10);
+            graphics.moveTo(0, 0);
+            graphics.lineTo(50, 0);
             graphics.lineTo(50, 50);
-            graphics.lineTo(10, 50);
-            graphics.lineTo(10, 10);
+            graphics.lineTo(0, 50);
+            graphics.lineTo(0, 0);
 
-            expect(graphics.width).to.be.equals(50);
-            expect(graphics.height).to.be.equals(50);
+            expect(graphics.width).to.be.equals(70);
+            expect(graphics.height).to.be.equals(70);
         });
     });
 });