A kite has vertices at open paren 2 comma 4 close paren , open paren 5 comma 4 close paren , open paren 5 comma 1 close paren , and open paren 0 comma negative 1 close paren What is the approximate perimeter of the kite? Round to the nearest tenth.

Use the distance formula to find the four side lengths in the order given. The first two sides are each 3 units; the other two are each √29 ≈ 5.4 units. The perimeter is 3 + 3 + √29 + √29 ≈ 16.8 units, so the correct choice is A, 16.8 units.

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