A triangle has a perimeter of 39 inches. If two sides are of equal length and the third side is 3 inches longer than either of the other two, how long is the longest side?

Answer 1

Let x = one of the shorter sides.

2x + x + 3 = 39

3x = 36

x = ?

Answer 2

12+12=24
24+6=30
30+9=39
6+9=15
15-12=3
Therefore the two shorter sides are 12cm and the longest side is 15cm.

Answer 3

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Answer 4

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