Set up and solve contextual measurement problems that require choosing the correct geometric formula and units.
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Problem
A trapezoidal patio has parallel sides \(14~\text{ft}\) and \(22~\text{ft}\) and height \(9~\text{ft}\). Name the required geometric quantity, calculate it, and give the units.
Big Picture
What this problem is really about
Model the patio as a flat trapezoidal region because tile covers its surface. Average the two parallel side lengths—or equivalently take one-half of their sum—then multiply by the perpendicular height. This uses every measurement in its geometric role and produces square feet rather than a perimeter in linear feet.
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