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Determine the perimeter of ABCD.

Determine the perimeter of ABCD.-example-1

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You add of the sides to get the perimeter.. 9 plus 9 is 18 and 5 plus 5 is 10. 10 plus 18 of 28. The perimeter of ABCD is 28.
I hope this helps.
User Ruben Sancho Ramos
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