If a polygon has 3 sides, but one side has zero length (or one angle is zero degree), is it still a triangle by definition of triangle?
and how about if it has 2 sides, if not 3 sides are zero?
If a polygon has 3 sides, but one side has zero length (or one angle is zero degree), is it still a triangle by definition of triangle?
and how about if it has 2 sides, if not 3 sides are zero?
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