Complex sentence: The Reuleaux triangle has also been used in other styles of architecture; for instance, a modern high-rise building, the Kölntriangle in Cologne, Germany, was built with a Reuleaux triangle cross-section.
Split into simpler sentences: The Reuleaux triangle has also been used in other styles of architecture. For instance, a modern high-rise building, the Kölntriangle in Cologne, Germany, was built with a Reuleaux triangle cross-section.