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To find the area of the quadrilateral, we first need to find the height of the trapezoid. The height is the distance between the two parallel sides, which is given as 8 inches.
Next, we can calculate the area of the trapezoid using the formula: Area = (1/2) x (sum of parallel sides) x height
Area = (1/2) x (12 + 10) x 8
Area = (1/2) x 22 x 8
Area = 11 x 8
Area = 88 square inches
Therefore, the area of the quadrilateral is 88 square inches.