diff --git a/geom.js b/geom.js
index d942747..70352ad 100644
--- a/geom.js
+++ b/geom.js
@@ -3,7 +3,37 @@ class Rectangle {
     this.length = length;
     this.width = width;
   }
-}
+  perimeter() {
+    return ((this.length + this.width) * 2);
+  }
+
+
+area(){
+    return this.length * this.width
+  }
+      isSquare() {
+      if(this.length === this.width){
+        return true;
+      }
+      else{
+       return false;
+      }
+  }
+  }
+  rectangle1 = new Rectangle(11,11);
+  rectangle1.isSquare();
+  rectangle1.area();
+  rectangle1.perimeter();
+
+ rectangle2 = new Rectangle(1,51);
+ rectangle2.isSquare();
+ rectangle2.area();
+ rectangle2.perimeter();
+
+ rectangle3 = new Rectangle(4,8);
+ rectangle3.isSquare();
+ rectangle3.area();
+ rectangle3.perimeter();
 
 
 class Triangle {
@@ -12,8 +42,47 @@ class Triangle {
     this.sideB = sideB;
     this.sideC = sideC;
   }
-}
+  isEquilateral(){
+    if(this.sideA === this.sideB && this.sideA === this.sideC )
+    {
+     
+      console.log("sorry ,this calculater is not for Equilateral Triangle");
+      return true;
+    }
+    else{
+      console.log("you can use this calculater");
+      return false;
+    }
+  }
+  isIsosceles(){
+    if((this.sideA === this.sideB && this.sideA !== this.sideC) || (this.sideC === this.sideB && this.sideA !== this.sideB) ){
+      return true;
+    }
+    else{
+      return false;
+    }
+  }
+
+  isObtuse() { // this function dont work , always return falls
+
+    if(((this.sideA *2)+(this.sideB *2) === (this.sideC *2))||((this.sideB *2)+(this.sideC *2) === this.sideA *2) ||((this.sideA *2)+(this.sideC *2) === this.sideB *2)) {
+return true
+    }
+    else {
+      return false;
+    }
+  }
+
 
+  area() {
+    return ((this.sideA + this.sideB + this.sideC) * 0.5);
+  }
+
+
+}
+triangle1 = new Triangle(20,20,20) //after googleing I found out if the tringle is Equilateral Triangle , it will have diffrant way to calculate
+triangle1.isEquilateral();
+triangle1.area();
 
 class LineSegment {
   constructor(x1, y1, x2, y2){
@@ -22,8 +91,17 @@ class LineSegment {
     this.x2 = x2;
     this.y2 = y2;
   }
+  length(){
+    for( var x = this.x1 ; x >= this.x2 ; x++){
+      this.length = x;
+    }
+    for(var y = this.y1 ; y >= this.y2 ; y++){
+      this.length = y;
+    }
+  }
 }
-
+let line = new LineSegment(2,3,14,10)
+line.length();
 // NOTE: DO NOT REMOVE OR ALTER
 module.exports = {
   Rectangle: Rectangle,