diff --git a/src/point.js b/src/point.js
index f5f4557f..c71e17c2 100644
--- a/src/point.js
+++ b/src/point.js
@@ -208,10 +208,17 @@ export class Point extends APoint {
     return this[AXES][Y];
   }
 
+  /**
+   * @param {() => number} alg
+   * @returns {Point & number}
+   */
   calc(alg) {
     return operatorCalc(alg, this);
   }
 
+  /**
+   * @returns {Point & number}
+   */
   clone() {
     return new Point(this.x, this.y);
   }
diff --git a/src/vector.js b/src/vector.js
index 9f337134..17a7b988 100644
--- a/src/vector.js
+++ b/src/vector.js
@@ -306,6 +306,9 @@ export class Vector extends AVector {
     return operatorCalc(alg, this);
   }
 
+  /**
+   * @returns {Vector & number}
+   */
   clone() {
     return new Vector(this.x, this.y, this.z);
   }
@@ -319,11 +322,18 @@ export class Victor extends AVector {
     return new Vector(this.x, this.y, this.z);
   }
 
+  /**
+   * @returns {Vector & number}
+   */
   clone() {
     return this;
   }
 }
 
+/**
+ * @param {() => number} alg
+ * @returns {Vector & number}
+ */
 export function calc(alg) {
   return operatorCalc(alg);
 }