This document discusses different types of angles that are commonly found and used in artworks, including acute, right, obtuse, complementary, supplementary, bisected, vertical, and linear pair angles. Examples are given of famous paintings that feature each type of angle, such as Johannes Vermeer's "The Milkmaid" demonstrating an obtuse angle, and Pablo Picasso's "Rembrandtesque Figure and Cupid" showing complementary angles. The document concludes with a bibliography citing an online art archive as the source.