diff --git a/solid/src/main/java/com/devtitlan/tutorial/solid/openClosePrinciple/Start.java b/solid/src/main/java/com/devtitlan/tutorial/solid/openClosePrinciple/Start.java
index 5bb3c4f..4820abe 100755
--- a/solid/src/main/java/com/devtitlan/tutorial/solid/openClosePrinciple/Start.java
+++ b/solid/src/main/java/com/devtitlan/tutorial/solid/openClosePrinciple/Start.java
@@ -6,7 +6,7 @@ public class Start {
 	
 	public double getArea(IShape shape) {
 		double area = 0;
-		 if(shape instanceof Circle) {
+		 if(shape instanceof Triangle) {
 			Triangle triangle = (Triangle) shape;
 			area= (triangle.getBase()*triangle.getHeight())/2;