Euclides was an ancient Greek mathematician, often referred to as the "Father of Geometry." He lived around 300 BCE in Alexandria, Egypt, and is best known for his work, the "Elements," which systematically compiled and organized the knowledge of geometry of his time. This influential text laid the groundwork for modern geometry and introduced concepts such as points, lines, and planes. The "Elements" consists of 13 books covering various topics, including plane geometry, number theory, and solid geometry. Euclides used a logical approach, starting with definitions, postulates, and common notions, leading to theorems and proofs. His work has had a lasting impact on mathematics and education throughout history.