16. If \( x=8 \) and \( y=5 \), what is the perimeter of the quadrilateral? SHOW YOUR WORK!
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To find the perimeter of a quadrilateral, we need to know the lengths of all its sides. Assuming this quadrilateral is a rectangle with \( x \) and \( y \) as the lengths of the sides, the perimeter \( P \) can be calculated using the formula: \[ P = 2(x + y) \] Given that \( x = 8 \) and \( y = 5 \), we can substitute these values into the formula. \[ P = 2(8 + 5) \] Calculating inside the parentheses first: \[ P = 2(13) \] Now multiplying by 2: \[ P = 26 \] Thus, the perimeter of the quadrilateral is \( 26 \) units.