Congruent obtuse angles

This is a sword display rack. The swords are arranged in an x shape, so they form a pair of obtuse vertical angles. This object was found in the URL http://www.usmilitaryswordsonline.com/Walnut-Large-Sword-Display-Shield_p_12.html through google images, and is often used to decorate houses, castles, museums, and other places where people spend time.