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sqdancefan
My graphing app says the perimeter is 11.04 +2.24 ≈ 13.3 units, corresponding to the 3rd selection.
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sissyrose

Answer:

13.3 units

Step-by-step explanation:

If you solve it using the distance formula, you get the following:

JK = 2.82

JM = 2.23

ML = 2.82

KL = 5.385

If you add those all together, you get the total perimeter, which = 13.255 ≈ 13.3 units.