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ANSWER:

3rd option: 6

STEP-BY-STEP EXPLANATION:

Given:

Perimeter: 216 inches

We know that 1 yard is equal to 36 inches.

Therefore, we do the conversion just like this:

[tex]216\text{ in}\cdot\frac{1\text{ yd}}{36\text{ in}}=6\text{ yd}[/tex]

Therefore, 216 inches equals 6 yards.

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