About Lesson
-
A plane surface is a flat, two-dimensional surface that extends infinitely in all directions. It has no curvature and is completely smooth and uniform.
- Examples:
- A tabletop
- A whiteboard
- Examples:
-
A plane curve is a curve that lies entirely in a single plane. It is a one-dimensional geometric figure within a two-dimensional plane.
- Examples:
- A circle
- A parabola
- An ellipse
- Examples: