We’re going to calculate the area of this trapezium. This trapezium, has as an A side of 24 millimeters, a B side of 16 millimeters, and a perpendicular height of nine millimeters. If we apply the formula, area equals the height, times the sum of A and B over two, we have nine times the sum of 24 and 16, over two. Twenty-four plus 16 equals 40. So we now have nine, times 40, over two. That’s 360 over two, which is 180. If you like, you can divide the 40 by two, and just work out nine times 20 can’t you? It’s still comes to 180. So the area of this trapezium is 180 millimeters squared.
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