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Anonymous
The perimeter could be anything between 136 and 156 inches.
We can't figure it out until we know the length of the third side,
and that could be anything between 58 and 78 inches.
Wiki User
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f(x) = 2x² f(x) = 136 → 2x² = 136 → x² = 68 → x = ±√68 As the positive value is required, x = √68 ≈ 8.246