A triangle has three different integer side lengths and a perimeter of 20 units. What is the max length of any one side?

1 answer:

3 0

X + x+1 + x + 2 = 20
3x + 3 = 20
3x = 17 but can't start with x = 6 because 6+7+8 > 20,
so have start with 5 + 6 + 7 = 18 are the 3 sides.

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