P5az9KlBenchech P5az9KlBenchech
  • 23-02-2017
  • Mathematics
contestada

A triangle has side lengths of 14 cm and 5 cm. which could be the value of the third side, 21 cm or 15 cm?

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wolf1728
wolf1728 wolf1728
  • 23-02-2017
A triangle with sides of 14 and 5 can have as its third side a length that is greater than the difference of the 2 sides (14 -5 = 9).
So third side must be longer than 9 and shorter than the sum of the 2 sides (14 + 5 = 19).  So the third side must be:
9 < third side < 19
So with the choice of a third side being 21 or 15, only thr side of 15 can form a triangle.


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