Answer: 994 mm^2
Explanation:
Let's calculate the surface area of both the triangular surfaces. To find the area of a triangle, we multiply the base by the height and divide by 2. The height is 12 and the base is 33. (12*33)/2 = 198. Since there are two triangular surfaces, we have 198 * 2 = 396 mm^2.
Now we can calculate the base surface, which is 7 * 33 = 231 mm^2 (width times length is the formula for calculating area of a rectangle).
The rectangular surface to the left of the diagram is 16 * 12 = 192 mm^2.
The rectangular surface to the right of the diagram is 25 * 7 = 175 mm^2.
Now we add up all our values: 396 + 231 + 192 + 175 = 994 mm^2.