diff --git a/src/OpenTK/Math/Quaternion.cs b/src/OpenTK/Math/Quaternion.cs
index ddd6cda6..0d92d00a 100644
--- a/src/OpenTK/Math/Quaternion.cs
+++ b/src/OpenTK/Math/Quaternion.cs
@@ -66,8 +66,9 @@ namespace OpenTK
         { }
 
         /// <summary>
-        /// Construct a new Quaternion from given Euler angles. The rotations will get applied in following order:
-        /// 1. Around X, 2. Around Y, 3. Around Z
+        /// Construct a new Quaternion from given Euler angles in radians. 
+        /// The rotations will get applied in following order:
+        /// 1. around X axis, 2. around Y axis, 3. around Z axis
         /// </summary>
         /// <param name="rotationX">Counterclockwise rotation around X axis in radian</param>
         /// <param name="rotationY">Counterclockwise rotation around Y axis in radian</param>
@@ -409,7 +410,7 @@ namespace OpenTK
         }
 
         /// <summary>
-        /// Build a quaternion from the given axis and angle
+        /// Build a quaternion from the given axis and angle in radians
         /// </summary>
         /// <param name="axis">The axis to rotate about</param>
         /// <param name="angle">The rotation angle in radians</param>
@@ -432,9 +433,9 @@ namespace OpenTK
         }
 
         /// <summary>
-        /// Builds a Quaternion from the given euler angles
+        /// Builds a Quaternion from the given euler angles in radians
         /// The rotations will get applied in following order:
-        /// 1. pitch, 2. yaw, 3. roll
+        /// 1. pitch (X axis), 2. yaw (Y axis), 3. roll (Z axis)
         /// </summary>
         /// <param name="pitch">The pitch (attitude), counterclockwise rotation around X axis</param>
         /// <param name="yaw">The yaw (heading), counterclockwise rotation around Y axis</param>
@@ -446,9 +447,9 @@ namespace OpenTK
         }
 
         /// <summary>
-        /// Builds a Quaternion from the given euler angles
+        /// Builds a Quaternion from the given euler angles in radians.
         /// The rotations will get applied in following order:
-        /// 1. Around X, 2. Around Y, 3. Around Z
+        /// 1. X axis, 2. Y axis, 3. Z axis
         /// </summary>
         /// <param name="eulerAngles">The counterclockwise euler angles as a vector</param>
         /// <returns>The equivalent Quaternion</returns>
diff --git a/tests/OpenTK.Tests.Math/QuaternionTests.cs b/tests/OpenTK.Tests.Math/QuaternionTests.cs
index 27f0a28b..d07fa732 100644
--- a/tests/OpenTK.Tests.Math/QuaternionTests.cs
+++ b/tests/OpenTK.Tests.Math/QuaternionTests.cs
@@ -50,7 +50,7 @@ namespace OpenTK.Tests.Math
 		/// or does not contain 0 when it should be</returns>
 		/// <param name="toTest">To test</param>
 		/// <param name="expected">Expected directions. Values getting only 0 checked</param>
-		public static bool VerifyEuqalSignleDirection(Vector3 toTest, Vector3 expected)
+		public static bool VerifyEqualSingleDirection(Vector3 toTest, Vector3 expected)
 		{
 			//To verify the direction of an vector, just respect the 0 values and check against these.
 			//The length of the vectors are ignored.
@@ -109,7 +109,7 @@ namespace OpenTK.Tests.Math
 			//Assert: Use helper, to check if part of the two correct axis is zero. I just want check the direction
 			Vector3 resultXYZ = cut.Xyz;
 
-			Assert.True(QuaternionTestHelper.VerifyEuqalSignleDirection(resultXYZ, expectedResult));
+			Assert.True(QuaternionTestHelper.VerifyEqualSingleDirection(resultXYZ, expectedResult));
 		}
 
 		/// <summary>
@@ -128,7 +128,7 @@ namespace OpenTK.Tests.Math
 			//Assert: Use helper, to check if part of the two correct axis is zero. I just want check the direction
 			Vector3 resultXYZ = cut.Xyz;
 
-			Assert.True(QuaternionTestHelper.VerifyEuqalSignleDirection(resultXYZ, expectedResult));
+			Assert.True(QuaternionTestHelper.VerifyEqualSingleDirection(resultXYZ, expectedResult));
 		}
 
 		/// <summary>
@@ -147,7 +147,7 @@ namespace OpenTK.Tests.Math
 			//Assert: Use helper, to check if part of the two correct axis is zero. I just want check the direction
 			Vector3 resultXYZ = cut.Xyz;
 
-			Assert.True(QuaternionTestHelper.VerifyEuqalSignleDirection(resultXYZ, expectedResult));
+			Assert.True(QuaternionTestHelper.VerifyEqualSingleDirection(resultXYZ, expectedResult));
 		}
 
 		/// <summary>
@@ -166,7 +166,7 @@ namespace OpenTK.Tests.Math
 			//Assert: Use helper, to check if part of the two correct axis is zero. I just want check the direction
 			Vector3 resultXYZ = cut.Xyz;
 
-			Assert.True(QuaternionTestHelper.VerifyEuqalSignleDirection(resultXYZ, expectedResult));
+			Assert.True(QuaternionTestHelper.VerifyEqualSingleDirection(resultXYZ, expectedResult));
 		}
 
 		/// <summary>
@@ -186,7 +186,7 @@ namespace OpenTK.Tests.Math
 			//Assert: Use helper, to check if part of the two correct axis is zero. I just want check the direction
 			Vector3 resultXYZ = cut.Xyz;
 
-			Assert.True(QuaternionTestHelper.VerifyEuqalSignleDirection(resultXYZ, expectedResult));
+			Assert.True(QuaternionTestHelper.VerifyEqualSingleDirection(resultXYZ, expectedResult));
 		}
 
 		/// <summary>
@@ -205,7 +205,7 @@ namespace OpenTK.Tests.Math
 			cut.ToAxisAngle(out resultXYZ, out dontCare);
 
 			//Assert: Use helper, to check if part of the two correct axis is zero. I just want check the direction
-			Assert.True(QuaternionTestHelper.VerifyEuqalSignleDirection(resultXYZ, expectedResult));
+			Assert.True(QuaternionTestHelper.VerifyEqualSingleDirection(resultXYZ, expectedResult));
 		}
 
 		//TODO: Make also checks with rotation angle