The edges of the surface are ____.

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Detailed Solution

The edges of the surface are lines.
Given a surface.
A surface is a outer layer of an object. A surface flat in two dimension and which has only area means only length and breadth. An edge is a line segment between faces or vertices.
We know that surface is a outer layer of an object. It may be flat or curved, but edges in the surface are must be line, ex- in square, rectangle. In edge is a line segment between two faces.
So, it represents a line segment.
Hence, the edges of the surface are lines.
Therefore, the correct answer is lines.

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