Triangle

HTML

<button id="remove">Remove path</button>

<svg xmlns="http://www.w3.org/2000/svg" version="1.1">
  <path class="path" d="M150 0 L75 200 L225 200 Z"></path>
    <circle radius="100px" cx="200px" cy="200px" fill="blue"></circle>
</svg>

JavaScript

document.id('remove').addEvents({
    click: function() {
        Array.each(document.getElements('.path'), function(el) {
            el.destroy();
        });
    }
});