18. Найди площадь изображённой на рисунке фигуры, если размер клетки 1 х 1.

The figure can be divided into three rectangles. The first rectangle has dimensions 2x2, so its area is 4. The second rectangle has dimensions 1x2, so its area is 2. The third rectangle has dimensions 2x1, so its area is 2. The total area is 4 + 2 + 2 = 8.