A planar surface is a flat, two-dimensional surface that extends infinitely in all directions within its plane. In mathematics and geometry, a plane is defined by a flat surface that is characterized by two dimensions—length and width—while having no depth. Planar surfaces can be represented in various ways, such as through geometric shapes (like rectangles or triangles), equations (such as the equation of a plane in 3D space), or in computer graphics as polygons.
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