diff --git a/geom.js b/geom.js
index d942747..58ade23 100644
--- a/geom.js
+++ b/geom.js
@@ -1,29 +1,89 @@
 class Rectangle {
-  constructor(length, width) {
-    this.length = length;
+  constructor(lenght, width) {
+
+    this.lenght = lenght;
     this.width = width;
+
+  }
+  isSquare() {
+
+    if (this.lenght === this.width)
+      return true;
   }
+  area() {
+
+    return this.length * this.width
+
+  }
+  perimeter() {
+
+    return 2 * (this.length + this.width)
+
+  }
+
 }
 
+let tri = new Rectangle(5, 10)
+
+tri.isSquare();
+tri.area(); // supposed to return 50 but instead it returned NaN 
+tri.perimeter();// NaN
+
+
+
+
 
 class Triangle {
-  constructor(sideA, sideB, sideC){
+  constructor(sideA, sideB, sideC) {
     this.sideA = sideA;
     this.sideB = sideB;
     this.sideC = sideC;
   }
-}
+  isEquilateral() {
+
+    if (this.sideA === this.sideB && this.sideB === this.sideC) {
+      return true;
+    } else { return false; }
+  }
+
+
+  isIsosceles() {
+    if (this.sideA === this.sideB || this.sideB === this.sideC)
+      return true;
+  }
+  area() {
+    return this.sideC * this.sideA / 2
+  }
+  isObtuse() {
+    if (this.sideA || this.sideB || this.sideC > 90) // was not so clear 
+      return true;
+  }
+
+  let tri = new Triangle(4, 2, 2)
+tri.isEquilateral();
+tri.isIsosceles();
+tri.area();// NaN 
+tri.isObtuse();// 
+
 
 
 class LineSegment {
-  constructor(x1, y1, x2, y2){
+  constructor(x1, y1, x2, y2) {
     this.x1 = x1;
     this.y1 = y1;
     this.x2 = x2;
     this.y2 = y2;
+
+  }
+  length() {
+    return Math.sqrt((x1 - x2) + (y2 - y1)) // I tried googling but it did not work ;(
   }
 }
 
+let ls = new LineSegment(8, 9, 4, 3)
+
+ls.length(); // I think I'm doing something wrong here but it can't be caught 
+
 // NOTE: DO NOT REMOVE OR ALTER
 module.exports = {
   Rectangle: Rectangle,