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A thin solid line directing attention to a note or dimension and starting with an arrow head or dot is known as :

  • A.Leader
  • B.Dimension line
  • C.Cutting plane line
  • D.Extension line

Answer: A

It is a leader.

A leader (leader line) is a thin continuous line drawn from a note or dimension to the feature it refers to. It ends in an arrowhead when it touches an outline and in a dot when it ends inside the outline of an object.

A dimension line shows the extent of a dimension and carries arrowheads at both ends. An extension (projection) line extends from the feature to the dimension line, and a cutting plane line, drawn chain thick at the ends, marks where a section is taken.

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