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    How much do you know about Technical Drawing?

    In the dihedral system, how is a straight line represented?

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    As a point in the horizontal projection and a line perpendicular to the ground line in the vertical.Correct
    As a point in the vertical projection and a line perpendicular to the ground line in the horizontal.
    As a straight line parallel to the ground line in both projections.
    As a point in both projections.

    A pointed line is perpendicular to the vertical plane of projection, so its vertical projection is a point and its horizontal projection is a line perpendicular to the ground line.

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