Which other works by Euclid have survived besides the Elements?

Beyond his most famous work, the Elements, several other treatises by Euclid have survived, though many others have been lost to history. His extant works include:12

• Data: A collection of 94 advanced geometric propositions focused on determining whether figures are constructible.1
• On Divisions: A work dealing with the division of figures by straight lines into specific ratios or areas.1
• Optics: The earliest Greek treatise on the subject of perspective.1
• Phaenomena: An introduction to mathematical astronomy, which is part of a corpus known as "the Little Astronomy".1
• Treatises on music: Two works, the Division of the Scale and the Introduction to Harmony, are attributed to him.1

While these works remain, other significant writings—such as the Pseudaria (Fallacies), the Porisms, the Conics, and the Surface-loci—are known only through descriptions in ancient sources and are considered lost.1