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Sagot :

Answer:

15 inches.

Step-by-step explanation:

Since we know its a square, we know that the side lengths are all equal. Knowing this, we know that we could find the area by taking a side length and squaring it. So we can take the square root of 219 to find the side length:

√219 = 14.79864859 ≈ 15

Therefore, the side lengths of the sign are about 15 inches.