diff --git a/packages/redgeometry/src/internal/bezier.ts b/packages/redgeometry/src/internal/bezier.ts
index 5a1beee..4c929c4 100644
--- a/packages/redgeometry/src/internal/bezier.ts
+++ b/packages/redgeometry/src/internal/bezier.ts
@@ -217,8 +217,8 @@ export function getArcLengthConic(c: BezierRCurve2): number {
 }
 
 export function getParameterAtArcLengthQuadratic(c: Bezier2Curve2, d: number): number {
-    const d1 = c.p1.sub(c.p0).len();
-    const d2 = c.p2.sub(c.p1).len();
+    const d1 = c.p1.distanceTo(c.p0);
+    const d2 = c.p2.distanceTo(c.p1);
 
     const r = solveQuadratic(d2 - d1, d1, -d);
 
@@ -231,9 +231,9 @@ export function getParameterAtArcLengthQuadratic(c: Bezier2Curve2, d: number): n
 }
 
 export function getParameterAtArcLengthCubic(c: Bezier3Curve2, d: number): number {
-    const d1 = c.p1.sub(c.p0).len();
-    const d2 = c.p2.sub(c.p1).len();
-    const d3 = c.p2.sub(c.p1).len();
+    const d1 = c.p1.distanceTo(c.p0);
+    const d2 = c.p2.distanceTo(c.p1);
+    const d3 = c.p2.distanceTo(c.p1);
 
     const r = solveCubic(d3 - 2 * d2 + d1, d2 - d1, d1, -d);
 
@@ -245,8 +245,8 @@ export function getParameterAtArcLengthCubic(c: Bezier3Curve2, d: number): numbe
 }
 
 export function getParameterAtArcLengthConic(c: BezierRCurve2, d: number): number {
-    const d1 = c.p1.sub(c.p0).len();
-    const d2 = c.p2.sub(c.p1).len();
+    const d1 = c.p1.distanceTo(c.p0);
+    const d2 = c.p2.distanceTo(c.p1);
     const dw = c.w * d1;
 
     const r = solveQuadratic(d2 - 2 * dw - d1, dw, -d);
diff --git a/packages/redgeometry/src/internal/path-dash.ts b/packages/redgeometry/src/internal/path-dash.ts
index 34d906c..35e2fd2 100644
--- a/packages/redgeometry/src/internal/path-dash.ts
+++ b/packages/redgeometry/src/internal/path-dash.ts
@@ -217,7 +217,7 @@ export function getDashStart(dashArray: number[], dashOffset: number): [number,
 }
 
 export function getDashArcLengthLinear(c: Bezier1Curve2): number {
-    return c.p1.sub(c.p0).len();
+    return c.p1.distanceTo(c.p0);
 }
 
 export function getDashParameterLinear(c: Bezier1Curve2, length: number): number {
diff --git a/packages/redgeometry/src/primitives/bezier.ts b/packages/redgeometry/src/primitives/bezier.ts
index 8cd791d..86036fd 100644
--- a/packages/redgeometry/src/primitives/bezier.ts
+++ b/packages/redgeometry/src/primitives/bezier.ts
@@ -957,8 +957,8 @@ export class BezierRCurve2 {
 
     public static fromCenterPoint(p0: Point2, p1: Point2, p2: Point2, pc: Point2): BezierRCurve2 {
         const pm = p0.lerp(p2, 0.5);
-        const dm = pm.sub(pc).len();
-        const d1 = p1.sub(pc).len();
+        const dm = pm.distanceTo(pc);
+        const d1 = p1.distanceTo(pc);
         const w = Math.sqrt(dm / d1);
         return new BezierRCurve2(p0, p1, p2, w);
     }
diff --git a/packages/redgeometry/src/primitives/edge.ts b/packages/redgeometry/src/primitives/edge.ts
index af888eb..5c0cd06 100644
--- a/packages/redgeometry/src/primitives/edge.ts
+++ b/packages/redgeometry/src/primitives/edge.ts
@@ -88,7 +88,7 @@ export class Edge2 {
         const p0 = e1.getValueAt(t);
         const p1 = e2.getValueAt(u);
 
-        return p0.sub(p1).len();
+        return p0.distanceTo(p1);
     }
 
     public static getClosestParameter(e1: Edge2, e2: Edge2): [number, number] {
@@ -299,7 +299,7 @@ export class Edge2 {
     }
 
     public getClosestPointDistance(p: Point2): number {
-        return this.getClosestPoint(p).sub(p).len();
+        return this.getClosestPoint(p).distanceTo(p);
     }
 
     /**
@@ -453,7 +453,7 @@ export class Edge3 {
     }
 
     public getClosestPointDistance(p: Point3): number {
-        return this.getClosestPoint(p).sub(p).len();
+        return this.getClosestPoint(p).distanceTo(p);
     }
 
     /**