Lesson plan

Closed lines

Closed line or closed lines could refer to: * Closed curve, a curve in mathematics where the two ends meet * Closed line segment, a line segment in mathematics that includes both its endpoints * Defunct airlines, or air travel companies that no longer exist * Line (formation), a military formation in which soldiers are packed together into rows * Close order formation, another military formation in which soldiers are packed together into a grid * Abandoned railway, or a train line that is no longer used

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Article summary

Closed line or closed lines could refer to: * Closed curve, a curve in mathematics where the two ends meet * Closed line segment, a line segment in mathematics that includes both its endpoints * Defunct airlines, or air travel companies that no longer exist * Line (formation), a military formation in which soldiers are packed together into rows * Close order formation, another military formation in which soldiers are packed together into a grid * Abandoned railway, or a train line that is no longer used

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Discussion questions

  1. Summarise the article in your own words. Which single claim would you verify first, and why?
  2. Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
  3. If two sources disagreed about one of these facts, what would you need in order to trust one over the other?

Bibliography

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Key claims and bibliography are generated from the same tracked claims and sources as the article page.