diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6c2f5f0..03386e6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,8 @@
 - X10D: Added `Circle`, `CircleF`, `Cuboid`, `Ellipse`, `EllipseF`, `Line3D`, `Line`, `LineF`, `Polygon`, `PolygonF`, `Polyhedron`, and `Sphere`, to complement System.Drawing structs such as `Point` and `Rectangle`
 - X10D: Added `DirectoryInfo.Clear([bool])`
 - X10D: Added `IList<T>.RemoveRange(Range)`
+- X10D: Added `Point.IsOnLine(LineF)`, `Point.IsOnLine(PointF, PointF)`, and `Point.IsOnLine(Vector2, Vector2)`
+- X10D: Added `PointF.IsOnLine(LineF)`, `PointF.IsOnLine(PointF, PointF)`, and `PointF.IsOnLine(Vector2, Vector2)`
 - X10D: Added `Point.ToSize()`
 - X10D: Added `Point.ToSizeF()`
 - X10D: Added `Point.ToVector2()`
@@ -17,6 +19,7 @@
 - X10D: Added `Size.ToVector2()`
 - X10D: Added `Quaternion.Multiply(Vector3)` - this functions as an equivalent to Unity's `Quaternion * Vector3` operator
 - X10D: Added `Vector2.Deconstruct()`
+- X10D: Added `Vector2.IsOnLine(LineF)`, `Vector2.IsOnLine(PointF, PointF)`, and `Vector2.IsOnLine(Vector2, Vector2)`
 - X10D: Added `Vector2.ToPointF()`
 - X10D: Added `Vector2.ToSizeF()`
 - X10D: Added `Vector3.Deconstruct()`
@@ -39,6 +42,8 @@
 - X10D.Unity: Added `Size.ToUnityVector2Int()`
 - X10D.Unity: Added `SizeF.ToUnityVector2()`
 - X10D.Unity: Added `Vector2.Deconstruct()`
+- X10D.Unity: Added `Vector2.IsOnLine(LineF)`, `Vector2.IsOnLine(PointF, PointF)`, and `Vector2.IsOnLine(Vector2, Vector2)`
+- X10D.Unity: Added `Vector2Int.IsOnLine(LineF)`, `Vector2Int.IsOnLine(PointF, PointF)`, `Vector2Int.IsOnLine(Vector2, Vector2)`, and `Vector2Int.IsOnLine(Vector2Int, Vector2Int)`
 - X10D.Unity: Added `Vector2.ToSystemPointF()`
 - X10D.Unity: Added `Vector2.ToSystemSizeF()`
 - X10D.Unity: Added `Vector2Int.Deconstruct()`
diff --git a/X10D.Unity/src/Drawing/PointFExtensions.cs b/X10D.Unity/src/Drawing/PointFExtensions.cs
index fa936ce..4940e46 100644
--- a/X10D.Unity/src/Drawing/PointFExtensions.cs
+++ b/X10D.Unity/src/Drawing/PointFExtensions.cs
@@ -2,6 +2,8 @@
 using System.Drawing;
 using System.Runtime.CompilerServices;
 using UnityEngine;
+using X10D.Drawing;
+using X10D.Unity.Numerics;
 
 namespace X10D.Unity.Drawing;
 
@@ -10,6 +12,23 @@ namespace X10D.Unity.Drawing;
 /// </summary>
 public static class PointFExtensions
 {
+    /// <summary>
+    ///     Determines if the current <see cref="PointF" /> lies on the specified <see cref="LineF" />.
+    /// </summary>
+    /// <param name="point">The point to check.</param>
+    /// <param name="start">The starting point of the line.</param>
+    /// <param name="end">The ending point of the line.</param>
+    /// <returns>
+    ///     <see langword="true" /> if <paramref name="point" /> lies on the line defined by <paramref name="start" /> and
+    ///     <paramref name="end" />; otherwise <see langword="false" />.
+    /// </returns>
+    [Pure]
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static bool IsOnLine(this PointF point, Vector2 start, Vector2 end)
+    {
+        return point.IsOnLine(start.ToSystemVector(), end.ToSystemVector());
+    }
+
     /// <summary>
     ///     Converts the current <see cref="Point" /> to a <see cref="Vector2" />.
     /// </summary>
diff --git a/X10D.Unity/src/Numerics/Vector2Extensions.cs b/X10D.Unity/src/Numerics/Vector2Extensions.cs
index 6ae262c..23ff4da 100644
--- a/X10D.Unity/src/Numerics/Vector2Extensions.cs
+++ b/X10D.Unity/src/Numerics/Vector2Extensions.cs
@@ -2,6 +2,8 @@
 using System.Drawing;
 using System.Runtime.CompilerServices;
 using UnityEngine;
+using X10D.Drawing;
+using X10D.Numerics;
 
 namespace X10D.Unity.Numerics;
 
@@ -22,6 +24,56 @@ public static class Vector2Extensions
         y = vector.y;
     }
 
+    /// <summary>
+    ///     Determines if the current <see cref="Vector2" /> lies on the specified <see cref="LineF" />.
+    /// </summary>
+    /// <param name="point">The point to check.</param>
+    /// <param name="line">The line on which the point may lie.</param>
+    /// <returns>
+    ///     <see langword="true" /> if <paramref name="point" /> lies on the line defined by <paramref name="line" />; otherwise
+    ///     <see langword="false" />.
+    /// </returns>
+    [Pure]
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static bool IsOnLine(this Vector2 point, LineF line)
+    {
+        return point.ToSystemVector().IsOnLine(line);
+    }
+
+    /// <summary>
+    ///     Determines if the current <see cref="Vector2" /> lies on the specified line.
+    /// </summary>
+    /// <param name="point">The point to check.</param>
+    /// <param name="start">The starting point of the line.</param>
+    /// <param name="end">The ending point of the line.</param>
+    /// <returns>
+    ///     <see langword="true" /> if <paramref name="point" /> lies on the line defined by <paramref name="start" /> and
+    ///     <paramref name="end" />; otherwise <see langword="false" />.
+    /// </returns>
+    [Pure]
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static bool IsOnLine(this Vector2 point, PointF start, PointF end)
+    {
+        return point.IsOnLine(new LineF(start, end));
+    }
+
+    /// <summary>
+    ///     Determines if the current <see cref="Vector2" /> lies on the specified line.
+    /// </summary>
+    /// <param name="point">The point to check.</param>
+    /// <param name="start">The starting point of the line.</param>
+    /// <param name="end">The ending point of the line.</param>
+    /// <returns>
+    ///     <see langword="true" /> if <paramref name="point" /> lies on the line defined by <paramref name="start" /> and
+    ///     <paramref name="end" />; otherwise <see langword="false" />.
+    /// </returns>
+    [Pure]
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static bool IsOnLine(this Vector2 point, Vector2 start, Vector2 end)
+    {
+        return point.ToSystemVector().IsOnLine(start.ToSystemVector(), end.ToSystemVector());
+    }
+
     /// <summary>
     ///     Converts the current <see cref="Vector2" /> into a <see cref="PointF" />.
     /// </summary>
diff --git a/X10D.Unity/src/Numerics/Vector2IntExtensions.cs b/X10D.Unity/src/Numerics/Vector2IntExtensions.cs
index fd551ae..babf2d9 100644
--- a/X10D.Unity/src/Numerics/Vector2IntExtensions.cs
+++ b/X10D.Unity/src/Numerics/Vector2IntExtensions.cs
@@ -2,6 +2,7 @@
 using System.Drawing;
 using System.Runtime.CompilerServices;
 using UnityEngine;
+using X10D.Drawing;
 
 namespace X10D.Unity.Numerics;
 
@@ -22,6 +23,73 @@ public static class Vector2IntExtensions
         y = vector.y;
     }
 
+    /// <summary>
+    ///     Determines if the current <see cref="Vector2Int" /> lies on the specified <see cref="LineF" />.
+    /// </summary>
+    /// <param name="point">The point to check.</param>
+    /// <param name="line">The line on which the point may lie.</param>
+    /// <returns>
+    ///     <see langword="true" /> if <paramref name="point" /> lies on the line defined by <paramref name="line" />; otherwise
+    ///     <see langword="false" />.
+    /// </returns>
+    [Pure]
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static bool IsOnLine(this Vector2Int point, LineF line)
+    {
+        return point.ToSystemPoint().IsOnLine(line);
+    }
+
+    /// <summary>
+    ///     Determines if the current <see cref="Vector2Int" /> lies on the specified line.
+    /// </summary>
+    /// <param name="point">The point to check.</param>
+    /// <param name="start">The starting point of the line.</param>
+    /// <param name="end">The ending point of the line.</param>
+    /// <returns>
+    ///     <see langword="true" /> if <paramref name="point" /> lies on the line defined by <paramref name="start" /> and
+    ///     <paramref name="end" />; otherwise <see langword="false" />.
+    /// </returns>
+    [Pure]
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static bool IsOnLine(this Vector2Int point, PointF start, PointF end)
+    {
+        return point.IsOnLine(new LineF(start, end));
+    }
+
+    /// <summary>
+    ///     Determines if the current <see cref="Vector2Int" /> lies on the specified line.
+    /// </summary>
+    /// <param name="point">The point to check.</param>
+    /// <param name="start">The starting point of the line.</param>
+    /// <param name="end">The ending point of the line.</param>
+    /// <returns>
+    ///     <see langword="true" /> if <paramref name="point" /> lies on the line defined by <paramref name="start" /> and
+    ///     <paramref name="end" />; otherwise <see langword="false" />.
+    /// </returns>
+    [Pure]
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static bool IsOnLine(this Vector2Int point, Vector2Int start, Vector2Int end)
+    {
+        return point.ToSystemPoint().IsOnLine(new LineF(start.ToSystemVector(), end.ToSystemVector()));
+    }
+
+    /// <summary>
+    ///     Determines if the current <see cref="Vector2Int" /> lies on the specified line.
+    /// </summary>
+    /// <param name="point">The point to check.</param>
+    /// <param name="start">The starting point of the line.</param>
+    /// <param name="end">The ending point of the line.</param>
+    /// <returns>
+    ///     <see langword="true" /> if <paramref name="point" /> lies on the line defined by <paramref name="start" /> and
+    ///     <paramref name="end" />; otherwise <see langword="false" />.
+    /// </returns>
+    [Pure]
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static bool IsOnLine(this Vector2Int point, Vector2 start, Vector2 end)
+    {
+        return point.ToSystemPoint().IsOnLine(new LineF(start.ToSystemVector(), end.ToSystemVector()));
+    }
+
     /// <summary>
     ///     Converts the current <see cref="Vector2Int" /> into a <see cref="Point" />.
     /// </summary>
diff --git a/X10D/src/Drawing/PointExtensions.cs b/X10D/src/Drawing/PointExtensions.cs
index 50c708f..f81f0e1 100644
--- a/X10D/src/Drawing/PointExtensions.cs
+++ b/X10D/src/Drawing/PointExtensions.cs
@@ -10,6 +10,68 @@ namespace X10D.Drawing;
 /// </summary>
 public static class PointExtensions
 {
+    /// <summary>
+    ///     Determines if the current <see cref="Point" /> lies on the specified <see cref="LineF" />.
+    /// </summary>
+    /// <param name="point">The point to check.</param>
+    /// <param name="line">The line on which the point may lie.</param>
+    /// <returns>
+    ///     <see langword="true" /> if <paramref name="point" /> lies on the line defined by <paramref name="line" />; otherwise
+    ///     <see langword="false" />.
+    /// </returns>
+    [Pure]
+#if NETSTANDARD2_1
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+#else
+    [MethodImpl(MethodImplOptions.AggressiveInlining | MethodImplOptions.AggressiveOptimization)]
+#endif
+    public static bool IsOnLine(this Point point, LineF line)
+    {
+        return ((PointF)point).IsOnLine(line);
+    }
+
+    /// <summary>
+    ///     Determines if the current <see cref="Point" /> lies on the specified line.
+    /// </summary>
+    /// <param name="point">The point to check.</param>
+    /// <param name="start">The starting point of the line.</param>
+    /// <param name="end">The ending point of the line.</param>
+    /// <returns>
+    ///     <see langword="true" /> if <paramref name="point" /> lies on the line defined by <paramref name="start" /> and
+    ///     <paramref name="end" />; otherwise <see langword="false" />.
+    /// </returns>
+    [Pure]
+#if NETSTANDARD2_1
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+#else
+    [MethodImpl(MethodImplOptions.AggressiveInlining | MethodImplOptions.AggressiveOptimization)]
+#endif
+    public static bool IsOnLine(this Point point, PointF start, PointF end)
+    {
+        return point.IsOnLine(new LineF(start, end));
+    }
+
+    /// <summary>
+    ///     Determines if the current <see cref="Point" /> lies on the specified line.
+    /// </summary>
+    /// <param name="point">The point to check.</param>
+    /// <param name="start">The starting point of the line.</param>
+    /// <param name="end">The ending point of the line.</param>
+    /// <returns>
+    ///     <see langword="true" /> if <paramref name="point" /> lies on the line defined by <paramref name="start" /> and
+    ///     <paramref name="end" />; otherwise <see langword="false" />.
+    /// </returns>
+    [Pure]
+#if NETSTANDARD2_1
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+#else
+    [MethodImpl(MethodImplOptions.AggressiveInlining | MethodImplOptions.AggressiveOptimization)]
+#endif
+    public static bool IsOnLine(this Point point, Vector2 start, Vector2 end)
+    {
+        return point.IsOnLine(new LineF(start, end));
+    }
+
     /// <summary>
     ///     Converts the current <see cref="Point" /> to a <see cref="Size" />.
     /// </summary>
diff --git a/X10D/src/Drawing/PointFExtensions.cs b/X10D/src/Drawing/PointFExtensions.cs
index cb9d3ac..13864e4 100644
--- a/X10D/src/Drawing/PointFExtensions.cs
+++ b/X10D/src/Drawing/PointFExtensions.cs
@@ -10,6 +10,71 @@ namespace X10D.Drawing;
 /// </summary>
 public static class PointFExtensions
 {
+    /// <summary>
+    ///     Determines if the current <see cref="PointF" /> lies on the specified <see cref="LineF" />.
+    /// </summary>
+    /// <param name="point">The point to check.</param>
+    /// <param name="line">The line on which the point may lie.</param>
+    /// <returns>
+    ///     <see langword="true" /> if <paramref name="point" /> lies on the line defined by <paramref name="line" />; otherwise
+    ///     <see langword="false" />.
+    /// </returns>
+    [Pure]
+#if NETSTANDARD2_1
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+#else
+    [MethodImpl(MethodImplOptions.AggressiveInlining | MethodImplOptions.AggressiveOptimization)]
+#endif
+    public static bool IsOnLine(this PointF point, LineF line)
+    {
+        (float x1, float x2) = (line.Start.X, line.End.X);
+        (float y1, float y2) = (line.Start.Y, line.End.Y);
+        (float x, float y) = (point.X, point.Y);
+        return System.Math.Abs((y2 - y1) * (x - x2) - (y - y2) * (x2 - x1)) < float.Epsilon;
+    }
+
+    /// <summary>
+    ///     Determines if the current <see cref="PointF" /> lies on the specified <see cref="LineF" />.
+    /// </summary>
+    /// <param name="point">The point to check.</param>
+    /// <param name="start">The starting point of the line.</param>
+    /// <param name="end">The ending point of the line.</param>
+    /// <returns>
+    ///     <see langword="true" /> if <paramref name="point" /> lies on the line defined by <paramref name="start" /> and
+    ///     <paramref name="end" />; otherwise <see langword="false" />.
+    /// </returns>
+    [Pure]
+#if NETSTANDARD2_1
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+#else
+    [MethodImpl(MethodImplOptions.AggressiveInlining | MethodImplOptions.AggressiveOptimization)]
+#endif
+    public static bool IsOnLine(this PointF point, PointF start, PointF end)
+    {
+        return point.IsOnLine(new LineF(start, end));
+    }
+
+    /// <summary>
+    ///     Determines if the current <see cref="PointF" /> lies on the specified <see cref="LineF" />.
+    /// </summary>
+    /// <param name="point">The point to check.</param>
+    /// <param name="start">The starting point of the line.</param>
+    /// <param name="end">The ending point of the line.</param>
+    /// <returns>
+    ///     <see langword="true" /> if <paramref name="point" /> lies on the line defined by <paramref name="start" /> and
+    ///     <paramref name="end" />; otherwise <see langword="false" />.
+    /// </returns>
+    [Pure]
+#if NETSTANDARD2_1
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+#else
+    [MethodImpl(MethodImplOptions.AggressiveInlining | MethodImplOptions.AggressiveOptimization)]
+#endif
+    public static bool IsOnLine(this PointF point, Vector2 start, Vector2 end)
+    {
+        return point.IsOnLine(new LineF(start, end));
+    }
+    
     /// <summary>
     ///     Converts the current <see cref="PointF" /> to a <see cref="SizeF" />.
     /// </summary>
diff --git a/X10D/src/Numerics/Vector2Extensions.cs b/X10D/src/Numerics/Vector2Extensions.cs
index 11533de..6ec710d 100644
--- a/X10D/src/Numerics/Vector2Extensions.cs
+++ b/X10D/src/Numerics/Vector2Extensions.cs
@@ -2,6 +2,7 @@
 using System.Drawing;
 using System.Numerics;
 using System.Runtime.CompilerServices;
+using X10D.Drawing;
 
 namespace X10D.Numerics;
 
@@ -22,6 +23,71 @@ public static class Vector2Extensions
         y = vector.Y;
     }
 
+    /// <summary>
+    ///     Determines if the current <see cref="Vector2" /> lies on the specified line.
+    /// </summary>
+    /// <param name="point">The point to check.</param>
+    /// <param name="line">The line on which the point may lie.</param>
+    /// <returns>
+    ///     <see langword="true" /> if <paramref name="point" /> lies on the line defined by <paramref name="line" />; otherwise
+    ///     <see langword="false" />.
+    /// </returns>
+    [Pure]
+#if NETSTANDARD2_1
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+#else
+    [MethodImpl(MethodImplOptions.AggressiveInlining | MethodImplOptions.AggressiveOptimization)]
+#endif
+    public static bool IsOnLine(this Vector2 point, LineF line)
+    {
+        (float x1, float x2) = (line.Start.X, line.End.X);
+        (float y1, float y2) = (line.Start.Y, line.End.Y);
+        (float x, float y) = (point.X, point.Y);
+        return System.Math.Abs((y2 - y1) * (x - x2) - (y - y2) * (x2 - x1)) < float.Epsilon;
+    }
+
+    /// <summary>
+    ///     Determines if the current <see cref="Vector2" /> lies on the specified line.
+    /// </summary>
+    /// <param name="point">The point to check.</param>
+    /// <param name="start">The starting point of the line.</param>
+    /// <param name="end">The ending point of the line.</param>
+    /// <returns>
+    ///     <see langword="true" /> if <paramref name="point" /> lies on the line defined by <paramref name="start" /> and
+    ///     <paramref name="end" />; otherwise <see langword="false" />.
+    /// </returns>
+    [Pure]
+#if NETSTANDARD2_1
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+#else
+    [MethodImpl(MethodImplOptions.AggressiveInlining | MethodImplOptions.AggressiveOptimization)]
+#endif
+    public static bool IsOnLine(this Vector2 point, PointF start, PointF end)
+    {
+        return point.IsOnLine(new LineF(start, end));
+    }
+
+    /// <summary>
+    ///     Determines if the current <see cref="Vector2" /> lies on the specified line.
+    /// </summary>
+    /// <param name="point">The point to check.</param>
+    /// <param name="start">The starting point of the line.</param>
+    /// <param name="end">The ending point of the line.</param>
+    /// <returns>
+    ///     <see langword="true" /> if <paramref name="point" /> lies on the line defined by <paramref name="start" /> and
+    ///     <paramref name="end" />; otherwise <see langword="false" />.
+    /// </returns>
+    [Pure]
+#if NETSTANDARD2_1
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+#else
+    [MethodImpl(MethodImplOptions.AggressiveInlining | MethodImplOptions.AggressiveOptimization)]
+#endif
+    public static bool IsOnLine(this Vector2 point, Vector2 start, Vector2 end)
+    {
+        return point.IsOnLine(new LineF(start, end));
+    }
+
     /// <summary>
     ///     Converts the current <see cref="Vector2" /> to a <see cref="PointF" />.
     /// </summary>