Projective geometry is a branch of mathematics that studies the properties of geometric figures that remain invariant under projection. It focuses on the relationships between points, lines, and planes, emphasizing their intersections and configurations rather than their specific measurements. This approach allows for a more abstract understanding of geometry. In projective geometry, parallel lines are said to meet at a point at infinity, which helps to simplify many concepts. This field has applications in various areas, including computer graphics, art, and perspective drawing, where understanding how objects appear from different viewpoints is essential.