cliparts/2/2/5/7/clipart-half-regular-triangle-tessellation-2257.svg image/svg+xml Open Clip Art Library half regular triangle tessellation 2011-03-18T04:17:26 This is a special tessellation. All of the black and white triangles are a regular triangle cut in half. They are called 30-60-90 triangles http://openclipart.org/detail/128173/half-regular-triangle-tessellation-by-10binary 10binary clip art clipart half regular tessellation triangle