The Surface of a black bord is a _
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Answer:
Plane ,I think so , btw I didn't understood your question perfectly
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Answer:
The surface area depends on the height and width of the blackboard.
Step-by-step explanation:
The blackboard is a plane because it has a flat surface.
In mathematics, a plane is a flat, two-dimensional surface that extends infinitely far. A plane is the two-dimensional analogue of a point (zero dimensions), a line (one dimension) and three-dimensional space.
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