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What distinguishes trim from extend?

  • A.trim shortens an entity to a boundary and extend lengthens it
  • B.trim lengthens an entity and extend shortens it
  • C.trim works on straight lines only and extend on arcs only
  • D.trim deletes the entity while extend copies it

Answer: A

Correct answer: trim shortens an entity to a boundary and extend lengthens it

The two are opposites operating on the same cutting or boundary edge: trim removes the part beyond it, extend carries the entity up to it. Together they are how a rough layout is brought to exact intersections, and using them is a good deal safer than picking the endpoint by eye.

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