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HTML 

              
                <div class="main-wrapper">
  <div class="form-wrapper">
    <form id="triangle-form" action="#">
      <fieldset>
        <label for="side-A">a:</label>
        <input type="text" name="side-A" id="sideA" placeholder="Enter side A length" />
      </fieldset>
      <fieldset>
        <label for="side-B">b:</label>
        <input type="text" name="side-B" id="sideB" placeholder="Enter side B length" />
      </fieldset>
      <fieldset>
        <label for="side-C">c:</label>
        <input type="text" name="side-C" id="sideC" placeholder="Enter side C length" />
      </fieldset>
      <fieldset class="buttons">
        <input type="submit" value="Submit" />
        <input type="reset" value="Reset" />
      </fieldset>
    </form>  
  </div> 
    
  <div class="results-wrapper">
    <span>Generated result:</span>
    <div class="list-wrapper">
      <span>Equilateral triangles:</span>
      <ul class="list equilateral-list">
      </<ul>
    </div>
    <div class="list-wrapper">
      <span>Isoscales triangles:</span>
      <ul class="list isosceles-list">
      </<ul>
    </div>
    <div class="list-wrapper">
      <span>Scalene triangles:</span>
      <ul class="list scalene-list">
      </<ul>
    </div>
  </div>
</div>
!

CSS 

              
                //FONT IMPORT
@import url(https://fonts.googleapis.com/css?family=Ubuntu:700&subset=latin,latin-ext);
//HOVER TRANSITION
$hover: all 0.2s ease-in;
$slide:all, 0.4s 0.1s, cubic-bezier(0.55,0,0.1,1);
//COLORS
$grey: #4f4f4f;
$light-grey: #8f8f8f;
$white: #ffffff;
$green: #39bda7;

body {
  background: url('http://thecodeplayer.com/uploads/media/geometry.png');
  font-family: 'Ubuntu', sans-serif;
}

form {
  padding-top: 10px;
  
  fieldset {
    border: none;
    
    label {
      display: block;
      padding-bottom: 5px;
    }
    input {
      border: 1px solid $light-grey;
      padding: 5px 10px;
      
      &:focus {
        border: 1px solid $grey;
      }
    }
    
    input[type="submit"] {
      display: inline-block;
      background-color: $green;
      cursor: pointer;
      color: #ffffff;
      border-color: darken($green, 5%);
      transition: $hover;
      
      &:hover {
        border-color: darken($green, 5%);
      }
    }
    
    input[type="reset"] {
      display: inline-block;
      background-color: $grey;
      cursor: pointer;
      color: #ffffff;
      border-color: darken($grey, 5%);
      transition: $hover;
      
      &:hover {
        border-color: darken($grey, 5%);
      }
    }
  }
}

.buttons {
  padding-top: 25px;
}
//APP
.main-wrapper {
  clear: both;
  max-width: 1200px;
  margin: 0 auto;
}

.form-wrapper {
  width: 225px;
  float: left;
  padding-right: 25px;
}

.results-wrapper {
  width: 925px;
  float: left;
  padding-left: 25px;
  height: 300px;
  padding-top: 15px;
  
  span {
    display: block;
    padding-bottom: 5px;
  }
  
  .list-wrapper {
    border: 1px solid $light-grey;
    background-color: #ffffff;
    width: 28%;
    margin-right: 1.5%;
    float: left;
    padding: 15px;
    min-height: 250px;
    
    span {
      color: $light-grey;
      font-size: 12px;
      padding-bottom: 5px;
      margin-bottom: 10px;
      display: block;
      border-bottom: 1px solid $light-grey;
    }
  }
}

.list {
  list-style: none;
  padding-left: 0;
  
  li {
    padding-bottom: 10px;
  }
  #canvas {
    
  }
}
!

JS 

              
                var isTriangle = function(side1,side2,side3) {
  if((side1 >= side2 + side3)||(side2 >= side1 + side3)||(side3 >= side1 + side2)) {
    return false;
  } else {
    return true;
  }
};
var orderSides = function(sides) {
  return sides.sort(function(a,b) { return a - b }).reverse();
};

var drawTriangle = function(sides) {
  var scale = 50/(sides[0]);
  var peakX = (scale * sides[1] * Math.sin(Math.PI / 2 - Math.acos((Math.pow(sides[0],2) + Math.pow(sides[1],2) - Math.pow(sides[2],2)) / (2 * sides[0] * sides[1])))).toFixed(1);
  var peakY = (scale * Math.sqrt(Math.pow(sides[1],2)-Math.pow(peakX / scale,2))).toFixed(1);
  var colorA = "#39bda7";
  var colorB = "#8f8f8f";
  return '<svg height="' + peakY + '" width="100" id="canvas"><polygon points="0,0 50,0 ' + peakX + ',' + peakY + '" style="fill:' + colorA +';stroke:' + colorB +';stroke-width:1" /></svg>';
};
$(document).ready(function(){
  $("#triangle-form").submit(function(event){
    event.preventDefault();

    var side1 = parseFloat($("#sideA").val());
    var side2 = parseFloat($("#sideB").val());
    var side3 = parseFloat($("#sideC").val());
    if (!isTriangle(side1,side2,side3)){
      alert('Those sides do not make a triangle! Try different lengths.')
    }
    else {
      var triangle = { side1: side1, side2: side2, side3: side3 };
      triangle['isEquilateral'] = function() {if((this.side1 === this.side2)&&(this.side2 === this.side3)) {return true;} else {return false;}};
      triangle['isIsosceles'] = function() {if((side1 === side2)||(side2 === side3)||(side3 === side1)) {return true;} else {return false;}};
      triangle['isScalene'] = function() {if((side1 === side2)||(side2 === side3)||(side3 === side1)) {return false;} else {return true;}};
      triangle['orderSides'] = function() {

      }

      if (triangle.isEquilateral()) {
        $('ul.equilateral-list').append("<li>" + triangle.side1 + " - " + triangle.side2 + " - " + triangle.side3 + "</li>");
        $('ul.equilateral-list').append(drawTriangle(orderSides([triangle.side1,triangle.side2,triangle.side3])));
      }
      else if (triangle.isIsosceles()){
        $('ul.isosceles-list').append("<li>" + triangle.side1 + " - " + triangle.side2 + " - " + triangle.side3 + "</li>");
        $('ul.isosceles-list').append(drawTriangle(orderSides([triangle.side1,triangle.side2,triangle.side3])));
      }
      else {
        $('ul.scalene-list').append("<li>" + triangle.side1 + " - " + triangle.side2 + " - " + triangle.side3 + "</li>");
        $('ul.scalene-list').append(drawTriangle(orderSides([triangle.side1,triangle.side2,triangle.side3])));
      }
    }
    var side1 = $("input#sideA").val("");
    var side2 = $("input#sideB").val("");
    var side3 = $("input#sideC").val("");
  });
});
!
999px

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