The area of the polygon is 428 ft²
Polygon are 2 dimensional shapes or figure and they are basically made from straight lines. Therefore, let's find the area of the polygon as follows:
The area of the shape above is the sum of the area of the individual shape. Lets divide the shape into two rectangle as follows:
area of rectangle1 = l × w = 13 × 26 = 338 ft²
area of rectangle2 = l × w = 9 × 10 = 90 ft²
Therefore,
total area = 90 + 338 = 428 ft²
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