JavaScript code: You need one of these for each formula. It goes between the tags. Remember to change the variables as needed!

jgold4 — 2016-12-16 00:49:48 UTC

function squarePerimeter() {
//This is the one input convereted to a number
var len = parseFloat(document.getElementById("length").value);
//calculate the volume and round to 2 decimal places.
var perimeter = Math.round(len * 4);

//could use this below to have a pop up message
//window.alert(volume + " " + unt + "^3",10,50);

//this is code for printing in a canvas on the webpage
var canvas = document.getElementById("myCanvas");
var ctx = canvas.getContext("2d");
//clears the canvas
ctx.clearRect(0, 0, myCanvas.width, myCanvas.height);
ctx.font = "18px verdana";
ctx.fillText(perimeter + " units", 1, 25);
}

HTML Form: This goes down in the Section. Remember to change the a id="", the formula and the variables.

jgold4 — 2016-12-16 00:51:46 UTC

Rectangle......... P = 2l + 2w

Enter the length and width:

Length:

Width:

Reference Sheet Code Snippets by Joshua Gold

JavaScript code: You need one of these for each formula. It goes between the tags. Remember to change the variables as needed!

HTML Form: This goes down in the Section. Remember to change the a id="", the formula and the variables.