diff --git a/src/TriangleChecker.java b/src/TriangleChecker.java
index 14f4841..f2fec71 100644
--- a/src/TriangleChecker.java
+++ b/src/TriangleChecker.java
@@ -47,8 +47,20 @@ public class TriangleChecker {
 
   // Analyse der Dreiecksart
   public static TriangleType checkTriangle(float a, float b, float c) {
+    if (checkTriangleType(a,b,c) ){
+      if(a==b && a==c){return TriangleType.EQUILATERAL;}
+      if(a==b||b==c||a==c){return TriangleType.ISOSCELES;}
+
+      return TriangleType.NORMAL;
+    }
     return TriangleType.NONE;
   }
 
 
+  public static boolean checkTriangleType(float a, float b, float c) {
+    if (a <= 0 || b <= 0 || c <= 0) {
+      return false;
+    }
+    return (a + b > c && b + c > a && a + c > b);
+  }
 }
\ No newline at end of file
diff --git a/test/TriangleCheckerTest.java b/test/TriangleCheckerTest.java
index 5c9ff57..73e54cd 100644
--- a/test/TriangleCheckerTest.java
+++ b/test/TriangleCheckerTest.java
@@ -10,12 +10,22 @@ public class TriangleCheckerTest {
         float a = 2;
         float b = 3;
         float c = 4;
+        float d = 12;
+        float e = 32;
+        float f = 7;
+        float h = 11;
+        float g = 41;
+        float i = 4;
 
-        // Act
-        TriangleChecker.TriangleType type = TriangleChecker.checkTriangle(a, b, c);
 
         // Assert
-        assertEquals(TriangleChecker.TriangleType.NORMAL, type);
+        assertTrue(TriangleChecker.checkTriangleType(a, b, c));
+        assertFalse(TriangleChecker.checkTriangleType(a, d, c));
+        assertTrue(TriangleChecker.checkTriangleType(e, d, e));
+        assertFalse(TriangleChecker.checkTriangleType(a, f, h));
+        assertFalse(TriangleChecker.checkTriangleType(i, c, d));
+        assertFalse(TriangleChecker.checkTriangleType(g, i, d));
+
 
     }