@@ -0,0 +1,65 @@
+'use strict';
+
+class Point {
+constructor(x, y) {
+this.x = x;
+this.y = y;
+}
+}
+
+class Polygone {
+constructor(...points) {
+this.points = points;
+}
+
+get area() {
+// implement area calculation
+}
+}
+
+class Rect extends Polygone {
+constructor(x1, y1, x2, y2) {
+const a = new Point(x1, y1);
+const b = new Point(x2, y1);
+const c = new Point(x2, y2);
+const d = new Point(x1, y2);
+super(a, b, c, d);
+}
+}
+
+class Triangle extends Polygone {
+constructor(x1, y1, x2, y2, x3, y3) {
+const a = new Point(x1, y1);
+const b = new Point(x2, y2);
+const c = new Point(x3, y3);
+super(a, b, c);
+}
+}
+
+class Geometry {
+static rotate(polygone, angle) {
+const { points } = polygone;
+const radians = Math.PI / 180 * angle;
+const sin = Math.sin(radians);
+const cos = Math.cos(radians);
+for (const point of points) {
+const { x, y } = point;
+point.x = x * cos - y * sin;
+point.y = x * sin + y * cos;
+}
+}
+}
+
+// Usage
+
+const rect = new Rect(10, 10, 30, -10);
+console.dir(rect);
+console.log('Rotate 45');
+Geometry.rotate(rect, 45);
+console.dir(rect);
+
+const triangle = new Triangle(0, 0, 15, 0, 0, 15);
+console.dir(triangle);
+console.log('Rotate 90');
+Geometry.rotate(triangle, 90);
+console.dir(triangle);