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Order objects by length

Length is a measurable attribute that can be compared directly, allowing objects to be arranged from shortest to longest or longest to shortest. Reliable ordering depends on matching a common endpoint and attending to the other endpoints rather than an object’s position or orientation; comparisons should be consistent across three or more objects, reflecting that if one length is less than a second and the second less than a third, the first is less than the third.

Detailed Explanation: Order objects by length

To order objects by length, compare them from the same starting point.

  1. Put one end of each object at the same place.
  2. Look at the other ends.
  3. The object that ends first is the shortest.
  4. The object that reaches farthest is the longest.

Example: We have three ribbons:

  • Ribbon A is 55 cubes long.
  • Ribbon B is 88 cubes long.
  • Ribbon C is 66 cubes long.

Line up one end of all three ribbons. Compare the other ends:

  • Ribbon A is shorter than Ribbon C because 5<65<6.
  • Ribbon C is shorter than Ribbon B because 6<86<8.
  • So Ribbon A is also shorter than Ribbon B.

From shortest to longest, the order is:

Ribbon A, Ribbon C, Ribbon B\text{Ribbon A},\ \text{Ribbon C},\ \text{Ribbon B}

Learn by doing: Order objects by length

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    Measurement - Compare Length - Order by Length

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