l6uciNiesabeller
l6uciNiesabeller l6uciNiesabeller
  • 03-09-2016
  • Mathematics
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the lengths of the sides of a triangle are in the ratio 5:6:7. describe the length of the longest side if the perimeter is less than 54cm

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seizetheday
seizetheday seizetheday
  • 03-09-2016
Adding the parts in the ratio gives 18 so there are two triangles possible with perimeters less than 54cm where the side lengths are all integers: a 5, 6, 7 triangle or a 10, 12, 14 triangle.

Therefore the length of the longest side must be either 7cm or 14cm (unless you want to include non-integer side lengths, then it could also be 3.5cm, 1.75cm etc)
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