diff --git a/index.html b/index.html
index d66c928..445f396 100644
--- a/index.html
+++ b/index.html
@@ -1,16 +1,19 @@
 <!DOCTYPE html>
 <html lang="en" dir="ltr">
-  <head>
-    <meta charset="utf-8">
-    <title>Basic Formulas</title>
-    <script src="./js/formulas.js" charset="utf-8"></script>
-  </head>
-  <body>
-    <h1>Basic Formulas</h1>
-    <ol>
-      <li>Open Developer Tools</li>
-      <li>Select the Console Tab</li>
-      <li>Begin typing JS functions to test output</li>
-    </ol>
-  </body>
-</html>
+
+<head>
+  <meta charset="utf-8">
+  <title>Basic Formulas</title>
+  <script src="./js/formulas.js" charset="utf-8"></script>
+</head>
+
+<body>
+  <h1>Basic Formulas</h1>
+  <ol>
+    <li>Open Developer Tools</li>
+    <li>Select the Console Tab</li>
+    <li>Begin typing JS functions to test output</li>
+  </ol>
+</body>
+
+</html>
\ No newline at end of file
diff --git a/js/formulas.js b/js/formulas.js
index 2435d53..7ceb191 100644
--- a/js/formulas.js
+++ b/js/formulas.js
@@ -1,80 +1,80 @@
-// Basic math formulaas
-function addition(num1, num2){
-  return -1;
+// Basic math formulas
+function addition(num1, num2) {
+  return num1 + num2;
 }
 
-function subtraction(num1, num2){
-  return -1;
+function subtraction(num1, num2) {
+  return num1 - num2;
 }
 
-function multiplication(num1, num2){
-  return -1;
+function multiplication(num1, num2) {
+  return num1 * num2;
 }
 
-function division(num1, num2){
-  return -1;
+function division(num1, num2) {
+  return num1 / num2;
 }
 
-// Area formulaas
-function areaSquare(side){
-  return -1;
+// Area formulas
+function areaSquare(side) {
+  return Math.pow(side, 2);
 }
 
-function areaRectangle(length, width){
-  return -1;
+function areaRectangle(length, width) {
+  return length * width;
 }
 
-function areaParallelogram(base, height){
-  return -1;
+function areaParallelogram(base, height) {
+  return base * height;
 }
 
-function areaTriangle(base, height){
-  return -1;
+function areaTriangle(base, height) {
+  return (base * height) / 2;
 }
 
-function Circle(radius){
-  return -1;
+function Circle(radius) {
+  return Math.pow(radius, 2) * Math.PI; // Math.PI uses the number PI & Math.Pow(X,Y) X to the power of Y
 }
 
-function Sphere(radius){
-  return -1;
+function Sphere(radius) {
+  return 4 * Math.PI * Math.pow(radius, 2);
 }
 
 // Surface Area formulas
-function surfaceAreaCube(side){
-  return -1;
+function surfaceAreaCube(side) {
+  return 6 * Math.pow(side, 2);
 }
 
-function surfaceAreaCylinder(radius, height){
-  return -1;
+function surfaceAreaCylinder(radius, height) {
+  return 2 * Math.PI * radius * height;
 }
 
 // Perimeter formulas
-function perimeterSquare(side){
-  return -1;
+function perimeterSquare(side) {
+  return 4 * side;
 }
 
-function perimeterRectangle(length, height){
-  return -1;
+function perimeterRectangle(length, height) {
+  return 2 * length + 2 * height;
 }
 
-function perimeterTriangle(side1, side2, side3){
-  return -1;
+function perimeterTriangle(side1, side2, side3) {
+  return side1 + side2 + side3;
 }
 
-function perimeterCircle(diameter){
-  return -1;
+function perimeterCircle(diameter) {
+  return Math.PI * diameter;
 }
 
 // Volume formulas
-function volumeCube(side){
-  return -1;
+function volumeCube(side) {
+  return Math.pow(side, 3);
 }
 
-function volumeRectangular(length, width, height){
-  return -1;
+function volumeRectangular(length, width, height) {
+  return length * width * height;
 }
 
-function volumeCylinder(radius, height){
-  return -1;
+function volumeCylinder(radius, height) {
+  return Math.PI * Math.pow(radius, 2) * height;
 }
