Internet Explorer and clip-path

Question

As far as I'm aware clip-path should work in IE, as demonstrated in many articles and this tutorial CSS Masking

However I can't get the below to run properly on IE, but it works fine on Chrome.

.container {
  position: relative;
  width: 240px;
  height: 500px;
  left: 50%;
  top: 50%;
}

.pentagon {
  -webkit-clip-path: polygon(0px 0px, 100px 0px, 112px 13px, 240px 13px, 240px 250px, -250px 250px);
  -o-clip-path: polygon(0px 0px, 100px 0px, 112px 13px, 240px 13px, 240px 250px, -250px 250px);
  -ms-clip-path: polygon(0px 0px, 100px 0px, 112px 13px, 240px 13px, 240px 250px, -250px 250px);
  float: left;
}

.avatar {
  margin-top: 50px;
}

html {
  text-align: center;
  min-height: 100%;
  background: linear-gradient(white, #ddd);
}

h1,
p {
  color: rgba(0, 0, 0, .3);
}

<div class="container">
  <div class="avatar">
    <img class="pentagon" src="http://25.media.tumblr.com/tumblr_m5nre6cxkQ1qbs7p5o1_r1_500.jpg" alt="" />
  </div>
</div>

<svg>
  <defs>
    <clipPath id="pentagon" clipPathUnits="objectBoundingBox">
      <polygon points=".5,0 1,.30 .2,1 .2,1 0,.30" />
    </clipPath>
  </defs>
</svg>

Answer 1

After more in depth research, when working with the image directly, IE supports clip as in rectangular shapes only but not clipPath complicated shapes.

My solution was to add the image to an SVG as below, and this time it works in both Chrome and IE9+.

Demo JsFiddle

body {
  background-color: #e0e0e0;
}

#image-wrapper {
  position: relative;
}

.svg-background,
.svg-image {
  clip-path: url(#clip-triangle);
}

.svg-image {
  -webkit-transition: all 0.5s ease 0.2s;
  -moz-transition: all 0.5s ease 0.2s;
  opacity: 1;
  transition: all 0.5s ease 0.2s;
}

svg.clip-svg {
  height: 250px;
  position: absolute;
  width: 250px;
}

#svg-1 {
  left: 0px;
  top: 0px;
}

<div id="image-wrapper">
  <svg id="svg-1" class="clip-svg">
        <rect class='svg-background' width="300" height="300" fill="#ffffff" />
        <image id="img-1" class='svg-image' width="300" height="300" xlink:href="http://25.media.tumblr.com/tumblr_m5nre6cxkQ1qbs7p5o1_r1_500.jpg" />
    </svg>
</div>
<svg id="svg-defs">
    <defs>
        <clipPath id="clip-triangle">
            <polygon points="0 0, 100 0, 112 13, 240 13, 240 250, -250 250"/>
        </clipPath>
    </defs>
</svg>